About Mechanical Engineering Toolkit
Mechanical Engineering Toolkit is a professional engineering calculator for students, researchers, and practicing engineers. Choose a formula, enter your variables, and get instant results - with calculation steps,...
Mechanical Engineering Toolkit is a professional engineering calculator for students, researchers, and practicing engineers. Choose a formula, enter your variables, and get instant results - with calculation steps, formulas, diagrams, and unit conversions shown along the way. Switch between SI and Imperial units anytime, save favorites, and find the right tool fast with recommendations by major. Save your inputs as named projects, and export any result as text, image, CSV or PDF. Categories and tools: Mechanics of Material . Moments of inertia of plane areas . Force-displacement relation of a bar . Torsion formula and angle of twist . Flexure formula of a beam . Transverse shear stress . Deflections and slopes of cantilever and simple beams . Plane stress transformation and Mohr's circle . Principal stresses and planes . Spherical shell and thin-walled pressure vessel stresses . Buckling load of a column . Thermal deformation and stress . Combined loading . Bolted / riveted joints . Fatigue safety factor . Shaft power and torque Statics . Centroid of an area . Resultant of a force system . Beam reactions . 2D truss analysis Machine Design . Helical compression springs . Spur gear geometry and stresses . Shaft fatigue design (DE-Goodman) . Bearing L10 life . Belt and chain drives . Bolt preload / torque-tension . Fillet weld strength . Press / shrink-fit interference . Shaft critical speed (Dunkerley) . Beam natural frequency (five end conditions) . Torsional natural frequency (one or two rotors) Fluids & Thermal . Reynolds number and flow regime . Pipe pressure drop (Darcy-Weisbach with Colebrook) . Pump and fan power . Composite wall conduction . Fin efficiency . Heat exchanger sizing by LMTD Theory of Elasticity . Constitutive relation of linear elastic material . Stress/strain of linear elastic material Composite Material . Lamina and laminate stress/strain . Lamina engineering constants . Laminate plane and 3D properties . Rule of mixtures . Failure criteria (Tsai-Hill, Tsai-Wu) Reference Tables . Drill & tap chart (metric and imperial thread series) . ISO 286 fits & tolerances . Standard sections (AISC W, IPE, HEB) . Unit converter No account required. Works offline. Available in English, Chinese, German, French, and Japanese.
Version History • Six new calculators: Hydraulic Cylinder, Thermal Radiation, Pump Affinity Laws, Flywheel Braking, Elastic Strain Energy and Pipe Insulation. • Two selectable worked examples for every mechanics-of-materials tool, plus clearer calculation steps and vessel checks. • Compare saved calculations in Projects, even across languages. • New material and pipe presets, localized search terms, and Undo for favorites. 1.20.0 5h ago - Added Machining Speeds & Feeds, Hydrostatic Pressure & Force, Bernoulli & Continuity, Transient Heating & Cooling, and Mass–Spring–Damper Vibration. - Find saved projects faster; the Unit Converter remembers your unit choices. - Clearer tool icons and more complete translations. - Fixed stress/strain conversions, calculator edge cases, saved results, and small-screen layouts. 1.19.0 2d ago • New Helical Extension Spring, Helical Torsion Spring and Hardness Conversion tools, plus Johnson buckling. • Navigate fields from the keyboard, with clearer validation and stronger error feedback. • Search and filter History, undo deletions and organize saved calculations in Projects. • Improved calculator layouts and a Recalculate prompt when inputs change. 1.18.0 5d ago New in 1.17.0: • Three new calculators: Thick-Walled Cylinder, for pressure vessels and hydraulic cylinders too thick for the thin-wall formula; Keys and Splines, with standard ISO key sizes; and Stress Concentration Factor, for shaft fillets and grooves, stepped bars and holes in plates, including the fatigue factor Kf. • Solve For now works on 45 calculators, adding beam deflection, pressure vessels, bolted joints, combined loading and more. • Fixes: a corrected Tresca stress in Failure Criteria, a corrected semicircle in Moments of Inertia and two beam deflection formulas, and no more crashes when reopening some saved calculations. 1.17.0 6d ago New in 1.16.0: • Three new heat-transfer tools: Convection Coefficient for tubes, plates, cylinders and natural convection; Heat Exchanger (ε-NTU) to find the outlet temperatures of an exchanger you already have; and Psychrometrics for moist air — humidity, dew point, wet bulb and enthalpy, drawn on a psychrometric chart. • Type sums and units straight into any number field: 3/8, 2*45.5, 12 ksi, 3/8 in or 212 °F, converted into the field's unit for you. • Solve For now works on 31 calculators, including all three new tools. 1.16.0 Oct 3 New in 1.15.0: • Solve for any input: set the result you want — a stress, a critical speed, an efficiency — and the app works the calculation backwards to the input that gives it. Available on 28 calculators. • Two new tools: Curved Beam in Bending, for hooks, C-frames and chain links, and Frames and Machines, for pinned structures the method of joints can't solve. • Your own materials everywhere: add, edit or copy fluids, thermal materials and composite laminae as well as solids, and manage them all in My Materials. 1.15.0 Sep 25 New in 1.14.0: • Shortcuts and widgets: convert units or open any calculator from Siri, Spotlight, the Shortcuts app or the Action button, and keep your favourite and recent tools on the Home Screen. • Premium unlocks every tool and removes ads on iPhone, iPad and Mac with one purchase — if you already removed ads, you have it. You can also unlock a single tool by watching one ad. • A new app icon, made for Liquid Glass. • The unit converter no longer shows a stray decimal point on round numbers in scientific notation. 1.14.0 Sep 20 New in 1.13.0: • New Thermodynamics tools: steam tables (IAPWS-IF97), ideal gas processes, the Otto, Diesel and Brayton cycles, and the Rankine cycle — with p–v and T–s diagrams. • On iPad, results now appear beside your inputs instead of on a page of their own. • Standard sections and composite presets fill in more calculators, and both fatigue tools draw the Goodman diagram. • History keeps your last 500 calculations. 1.13.0 Sep 12 New in 1.12.0: • Beam Load Analysis now covers six support arrangements — cantilever, overhang, propped and fixed-ended — with any number of point, distributed and moment loads. • New Bolt Grades & Torque reference: ISO 898-1 and SAE J429, with clamp load and tightening torque. • New Power Screw calculator: torque, efficiency and self-locking. • Japanese and Chinese PDF reports no longer drop characters. 1.12.0 Sep 7 New in 1.11.0: • Every tool now explains itself — tap ? in the app bar for what it computes, the formula, and how to read the result. In all six languages. • Tolerance stack-up: chain any number of dimensions, by worst-case and RSS. • Standard pipe schedules (ASME B36.10M, NPS 1/8–24) fill Reynolds Number and Pipe Pressure Drop. • Projects now hold several calculations and export as one PDF report. 1.11.0 Aug 28 New in 1.10.0: • Vibration — three new Machine Design tools: shaft critical speed, beam natural frequency across five end conditions, and torsional natural frequency for one or two rotors. • Fill a beam's natural frequency straight from a standard section. • Remove Ads now available on Android, with purchase restoration. • Faster launch and fixes to purchase restore. 1.10.0 Aug 21 New in 1.9.0: • Fluids & Thermal — a new category: Reynolds number, pipe pressure drop, pump and fan power, wall conduction, fin efficiency and heat exchanger sizing. • Standard Sections — AISC W, IPE and HEB shapes with full properties. Fill a beam straight from a section. • Built-in fluid and thermal material property lists. • Fixed PDF export in Chinese and Japanese. • This update requires iOS 15 or later. 1.9.0 Aug 14 New in 1.8.0: • Projects — save a calculation's inputs under a name and reopen them any time. • Export any result as a PDF report or a CSV file. • One share button, with a choice of format: text, image, PDF, or CSV. • Choose a light or dark appearance, or follow your device. • More of the app is translated, and search now works in every language. • Fixed a crash when naming a project. 1.8.0 Aug 9 New in 1.7.0: • Drill & tap chart — search any thread for its tap drill and clearance drill size. • ISO 286 fits & tolerances table — look up hole and shaft limits by diameter and fit. • Choose your app language from the side menu. • Now available in German, French, and Japanese. 1.7.0 Aug 2 New in 1.6.0: • New Machine Design calculators: springs, spur gears, shaft fatigue, bearing life, belt & chain drives, bolted joints, welds, and press fits. • Added composite failure criteria (Tsai-Hill & Tsai-Wu). • Smoother experience with animated tool icons and clearer illustrations. • Better tool recommendations by major. 1.6.0 Jul 24 New in 1.5.0: • New calculators: Mohr's Circle, Bolted Joint, Combined Loading, and Fatigue Safety Factor. • New Truss Analysis tool for 2D statics. • Switch between SI and Imperial units across calculators. • Find tools faster with major-based recommendations. 1.5.0 Jul 18 New in 1.4.0: • Analyze beams with new section-property and load-analysis tools, including engineering diagrams. • Enjoy a cleaner, responsive design with clearer list and grid views. • Remove ads permanently with a one-time purchase. • Improved keyboard behavior and advertising privacy controls. 1.4.0 Jul 15 New in 1.3.0: • Enhanced Calculation History: Now logs your specific input values for every calculation. • Smart Restore: Tapping a history record automatically pre-fills the calculator with your previous inputs. • Improved Layout: Reordered tool categories and optimized grid mode for better visibility on all devices. • Manage History: Swipe to delete individual history records. • Simplified Favorites: A cleaner, more focused list for your bookmarked tools. 1.3.0 Jul 4 New Calculators — Mechanics of Materials • Thermal deformation & stress (α, ΔT, L, E) • Transverse shear stress in beams (τ = VQ/It) • Angle of twist for circular shafts (φ = TL/GJ) • Shaft power & torque (find T or P from RPM) • Failure criteria — Von Mises & Tresca with factor of safety Calculation Steps Every result page now shows a full step-by-step breakdown: the formula, values substituted in, and the final result. Tap the card to copy the entire calculation to your clipboard. Share Results A share button on every result page lets you send the result and calculation steps via Messages, Mail, Notes, or any other app. Improvements • Composite material tools updated with thermal-elastic support • Rules of Mixture upgraded to transversely isotropic fiber model • Laminate 3D properties now shows full stiffness and compliance matrices 1.2.0 Jun 24 1. bug fixes. 1.0.6 09/24/2024 1. App optimization 1.0.4 08/27/2022 1. Add new languages. 1.0.1 01/27/2022 1.0.0 01/11/2022
Previous Versions
Here you can find the changelog of Mechanical Engineering Toolkit since it was posted on our website on 2023-06-27 12:22:39.
The latest version is 1.20.0 and it was updated on 2026-10-14 02:37:51. See below the changes in each version.
Mechanical Engineering Toolkit version 1.20.0
Updated At: 2026-10-13
Changes: Version History • Six new calculators: Hydraulic Cylinder, Thermal Radiation, Pump Affinity Laws, Flywheel Braking, Elastic Strain Energy and Pipe Insulation.
• Two selectable worked examples for every mechanics-of-materials tool, plus clearer calculation steps and vessel checks.
• Compare saved calculations in Projects, even across languages.
• New material and pipe presets, localized search terms, and Undo for favorites. 1.20.0 5h ago - Added Machining Speeds & Feeds, Hydrostatic Pressure & Force, Bernoulli & Continuity, Transient Heating & Cooling, and Mass–Spring–Damper Vibration.
- Find saved projects faster; the Unit Converter remembers your unit choices.
- Clearer tool icons and more complete translations.
- Fixed stress/strain conversions, calculator edge cases, saved results, and small-screen layouts. 1.19.0 2d ago • New Helical Extension Spring, Helical Torsion Spring and Hardness Conversion tools, plus Johnson buckling.
• Navigate fields from the keyboard, with clearer validation and stronger error feedback.
• Search and filter History, undo deletions and organize saved calculations in Projects.
• Improved calculator layouts and a Recalculate prompt when inputs change. 1.18.0 5d ago New in 1.17.0:
• Three new calculators: Thick-Walled Cylinder, for pressure vessels and hydraulic cylinders too thick for the thin-wall formula; Keys and Splines, with standard ISO key sizes; and Stress Concentration Factor, for shaft fillets and grooves, stepped bars and holes in plates, including the fatigue factor Kf.
• Solve For now works on 45 calculators, adding beam deflection, pressure vessels, bolted joints, combined loading and more.
• Fixes: a corrected Tresca stress in Failure Criteria, a corrected semicircle in Moments of Inertia and two beam deflection formulas, and no more crashes when reopening some saved calculations. 1.17.0 6d ago New in 1.16.0:
• Three new heat-transfer tools: Convection Coefficient for tubes, plates, cylinders and natural convection; Heat Exchanger (ε-NTU) to find the outlet temperatures of an exchanger you already have; and Psychrometrics for moist air — humidity, dew point, wet bulb and enthalpy, drawn on a psychrometric chart.
• Type sums and units straight into any number field: 3/8, 2*45.5, 12 ksi, 3/8 in or 212 °F, converted into the field's unit for you.
• Solve For now works on 31 calculators, including all three new tools. 1.16.0 Oct 3 New in 1.15.0:
• Solve for any input: set the result you want — a stress, a critical speed, an efficiency — and the app works the calculation backwards to the input that gives it. Available on 28 calculators.
• Two new tools: Curved Beam in Bending, for hooks, C-frames and chain links, and Frames and Machines, for pinned structures the method of joints can't solve.
• Your own materials everywhere: add, edit or copy fluids, thermal materials and composite laminae as well as solids, and manage them all in My Materials. 1.15.0 Sep 25 New in 1.14.0:
• Shortcuts and widgets: convert units or open any calculator from Siri, Spotlight, the Shortcuts app or the Action button, and keep your favourite and recent tools on the Home Screen.
• Premium unlocks every tool and removes ads on iPhone, iPad and Mac with one purchase — if you already removed ads, you have it. You can also unlock a single tool by watching one ad.
• A new app icon, made for Liquid Glass.
• The unit converter no longer shows a stray decimal point on round numbers in scientific notation. 1.14.0 Sep 20 New in 1.13.0:
• New Thermodynamics tools: steam tables (IAPWS-IF97), ideal gas processes, the Otto, Diesel and Brayton cycles, and the Rankine cycle — with p–v and T–s diagrams.
• On iPad, results now appear beside your inputs instead of on a page of their own.
• Standard sections and composite presets fill in more calculators, and both fatigue tools draw the Goodman diagram.
• History keeps your last 500 calculations. 1.13.0 Sep 12 New in 1.12.0:
• Beam Load Analysis now covers six support arrangements — cantilever, overhang, propped and fixed-ended — with any number of point, distributed and moment loads.
• New Bolt Grades & Torque reference: ISO 898-1 and SAE J429, with clamp load and tightening torque.
• New Power Screw calculator: torque, efficiency and self-locking.
• Japanese and Chinese PDF reports no longer drop characters. 1.12.0 Sep 7 New in 1.11.0:
• Every tool now explains itself — tap ? in the app bar for what it computes, the formula, and how to read the result. In all six languages.
• Tolerance stack-up: chain any number of dimensions, by worst-case and RSS.
• Standard pipe schedules (ASME B36.10M, NPS 1/8–24) fill Reynolds Number and Pipe Pressure Drop.
• Projects now hold several calculations and export as one PDF report. 1.11.0 Aug 28 New in 1.10.0:
• Vibration — three new Machine Design tools: shaft critical speed, beam natural frequency across five end conditions, and torsional natural frequency for one or two rotors.
• Fill a beam's natural frequency straight from a standard section.
• Remove Ads now available on Android, with purchase restoration.
• Faster launch and fixes to purchase restore. 1.10.0 Aug 21 New in 1.9.0:
• Fluids & Thermal — a new category: Reynolds number, pipe pressure drop, pump and fan power, wall conduction, fin efficiency and heat exchanger sizing.
• Standard Sections — AISC W, IPE and HEB shapes with full properties. Fill a beam straight from a section.
• Built-in fluid and thermal material property lists.
• Fixed PDF export in Chinese and Japanese.
• This update requires iOS 15 or later. 1.9.0 Aug 14 New in 1.8.0:
• Projects — save a calculation's inputs under a name and reopen them any time.
• Export any result as a PDF report or a CSV file.
• One share button, with a choice of format: text, image, PDF, or CSV.
• Choose a light or dark appearance, or follow your device.
• More of the app is translated, and search now works in every language.
• Fixed a crash when naming a project. 1.8.0 Aug 9 New in 1.7.0:
• Drill & tap chart — search any thread for its tap drill and clearance drill size.
• ISO 286 fits & tolerances table — look up hole and shaft limits by diameter and fit.
• Choose your app language from the side menu.
• Now available in German, French, and Japanese. 1.7.0 Aug 2 New in 1.6.0:
• New Machine Design calculators: springs, spur gears, shaft fatigue, bearing life, belt & chain drives, bolted joints, welds, and press fits.
• Added composite failure criteria (Tsai-Hill & Tsai-Wu).
• Smoother experience with animated tool icons and clearer illustrations.
• Better tool recommendations by major. 1.6.0 Jul 24 New in 1.5.0:
• New calculators: Mohr's Circle, Bolted Joint, Combined Loading, and Fatigue Safety Factor.
• New Truss Analysis tool for 2D statics.
• Switch between SI and Imperial units across calculators.
• Find tools faster with major-based recommendations. 1.5.0 Jul 18 New in 1.4.0:
• Analyze beams with new section-property and load-analysis tools, including engineering diagrams.
• Enjoy a cleaner, responsive design with clearer list and grid views.
• Remove ads permanently with a one-time purchase.
• Improved keyboard behavior and advertising privacy controls. 1.4.0 Jul 15 New in 1.3.0:
• Enhanced Calculation History: Now logs your specific input values for every calculation.
• Smart Restore: Tapping a history record automatically pre-fills the calculator with your previous inputs.
• Improved Layout: Reordered tool categories and optimized grid mode for better visibility on all devices.
• Manage History: Swipe to delete individual history records.
• Simplified Favorites: A cleaner, more focused list for your bookmarked tools. 1.3.0 Jul 4 New Calculators — Mechanics of Materials
• Thermal deformation & stress (α, ΔT, L, E)
• Transverse shear stress in beams (τ = VQ/It)
• Angle of twist for circular shafts (φ = TL/GJ)
• Shaft power & torque (find T or P from RPM)
• Failure criteria — Von Mises & Tresca with factor of safety
Calculation Steps
Every result page now shows a full step-by-step breakdown: the formula, values substituted in, and the final result. Tap the card to copy the entire calculation to your clipboard.
Share Results
A share button on every result page lets you send the result and calculation steps via Messages, Mail, Notes, or any other app.
Improvements
• Composite material tools updated with thermal-elastic support
• Rules of Mixture upgraded to transversely isotropic fiber model
• Laminate 3D properties now shows full stiffness and compliance matrices 1.2.0 Jun 24 1. bug fixes. 1.0.6 09/24/2024 1. App optimization 1.0.4 08/27/2022 1. Add new languages. 1.0.1 01/27/2022 1.0.0 01/11/2022
Mechanical Engineering Toolkit version 1.16.0
Updated At: 2026-10-06
Changes: Version History New in 1.16.0:
• Three new heat-transfer tools: Convection Coefficient for tubes, plates, cylinders and natural convection; Heat Exchanger (ε-NTU) to find the outlet temperatures of an exchanger you already have; and Psychrometrics for moist air — humidity, dew point, wet bulb and enthalpy, drawn on a psychrometric chart.
• Type sums and units straight into any number field: 3/8, 2*45.5, 12 ksi, 3/8 in or 212 °F, converted into the field's unit for you.
• Solve For now works on 31 calculators, including all three new tools. 1.16.0 2d ago New in 1.15.0:
• Solve for any input: set the result you want — a stress, a critical speed, an efficiency — and the app works the calculation backwards to the input that gives it. Available on 28 calculators.
• Two new tools: Curved Beam in Bending, for hooks, C-frames and chain links, and Frames and Machines, for pinned structures the method of joints can't solve.
• Your own materials everywhere: add, edit or copy fluids, thermal materials and composite laminae as well as solids, and manage them all in My Materials. 1.15.0 Sep 25 New in 1.14.0:
• Shortcuts and widgets: convert units or open any calculator from Siri, Spotlight, the Shortcuts app or the Action button, and keep your favourite and recent tools on the Home Screen.
• Premium unlocks every tool and removes ads on iPhone, iPad and Mac with one purchase — if you already removed ads, you have it. You can also unlock a single tool by watching one ad.
• A new app icon, made for Liquid Glass.
• The unit converter no longer shows a stray decimal point on round numbers in scientific notation. 1.14.0 Sep 20 New in 1.13.0:
• New Thermodynamics tools: steam tables (IAPWS-IF97), ideal gas processes, the Otto, Diesel and Brayton cycles, and the Rankine cycle — with p–v and T–s diagrams.
• On iPad, results now appear beside your inputs instead of on a page of their own.
• Standard sections and composite presets fill in more calculators, and both fatigue tools draw the Goodman diagram.
• History keeps your last 500 calculations. 1.13.0 Sep 12 New in 1.12.0:
• Beam Load Analysis now covers six support arrangements — cantilever, overhang, propped and fixed-ended — with any number of point, distributed and moment loads.
• New Bolt Grades & Torque reference: ISO 898-1 and SAE J429, with clamp load and tightening torque.
• New Power Screw calculator: torque, efficiency and self-locking.
• Japanese and Chinese PDF reports no longer drop characters. 1.12.0 Sep 7 New in 1.11.0:
• Every tool now explains itself — tap ? in the app bar for what it computes, the formula, and how to read the result. In all six languages.
• Tolerance stack-up: chain any number of dimensions, by worst-case and RSS.
• Standard pipe schedules (ASME B36.10M, NPS 1/8–24) fill Reynolds Number and Pipe Pressure Drop.
• Projects now hold several calculations and export as one PDF report. 1.11.0 Aug 28 New in 1.10.0:
• Vibration — three new Machine Design tools: shaft critical speed, beam natural frequency across five end conditions, and torsional natural frequency for one or two rotors.
• Fill a beam's natural frequency straight from a standard section.
• Remove Ads now available on Android, with purchase restoration.
• Faster launch and fixes to purchase restore. 1.10.0 Aug 21 New in 1.9.0:
• Fluids & Thermal — a new category: Reynolds number, pipe pressure drop, pump and fan power, wall conduction, fin efficiency and heat exchanger sizing.
• Standard Sections — AISC W, IPE and HEB shapes with full properties. Fill a beam straight from a section.
• Built-in fluid and thermal material property lists.
• Fixed PDF export in Chinese and Japanese.
• This update requires iOS 15 or later. 1.9.0 Aug 14 New in 1.8.0:
• Projects — save a calculation's inputs under a name and reopen them any time.
• Export any result as a PDF report or a CSV file.
• One share button, with a choice of format: text, image, PDF, or CSV.
• Choose a light or dark appearance, or follow your device.
• More of the app is translated, and search now works in every language.
• Fixed a crash when naming a project. 1.8.0 Aug 9 New in 1.7.0:
• Drill & tap chart — search any thread for its tap drill and clearance drill size.
• ISO 286 fits & tolerances table — look up hole and shaft limits by diameter and fit.
• Choose your app language from the side menu.
• Now available in German, French, and Japanese. 1.7.0 Aug 2 New in 1.6.0:
• New Machine Design calculators: springs, spur gears, shaft fatigue, bearing life, belt & chain drives, bolted joints, welds, and press fits.
• Added composite failure criteria (Tsai-Hill & Tsai-Wu).
• Smoother experience with animated tool icons and clearer illustrations.
• Better tool recommendations by major. 1.6.0 Jul 24 New in 1.5.0:
• New calculators: Mohr's Circle, Bolted Joint, Combined Loading, and Fatigue Safety Factor.
• New Truss Analysis tool for 2D statics.
• Switch between SI and Imperial units across calculators.
• Find tools faster with major-based recommendations. 1.5.0 Jul 18 New in 1.4.0:
• Analyze beams with new section-property and load-analysis tools, including engineering diagrams.
• Enjoy a cleaner, responsive design with clearer list and grid views.
• Remove ads permanently with a one-time purchase.
• Improved keyboard behavior and advertising privacy controls. 1.4.0 Jul 15 New in 1.3.0:
• Enhanced Calculation History: Now logs your specific input values for every calculation.
• Smart Restore: Tapping a history record automatically pre-fills the calculator with your previous inputs.
• Improved Layout: Reordered tool categories and optimized grid mode for better visibility on all devices.
• Manage History: Swipe to delete individual history records.
• Simplified Favorites: A cleaner, more focused list for your bookmarked tools. 1.3.0 Jul 4 New Calculators — Mechanics of Materials
• Thermal deformation & stress (α, ΔT, L, E)
• Transverse shear stress in beams (τ = VQ/It)
• Angle of twist for circular shafts (φ = TL/GJ)
• Shaft power & torque (find T or P from RPM)
• Failure criteria — Von Mises & Tresca with factor of safety
Calculation Steps
Every result page now shows a full step-by-step breakdown: the formula, values substituted in, and the final result. Tap the card to copy the entire calculation to your clipboard.
Share Results
A share button on every result page lets you send the result and calculation steps via Messages, Mail, Notes, or any other app.
Improvements
• Composite material tools updated with thermal-elastic support
• Rules of Mixture upgraded to transversely isotropic fiber model
• Laminate 3D properties now shows full stiffness and compliance matrices 1.2.0 Jun 24 1. bug fixes. 1.0.6 09/24/2024 1. App optimization 1.0.4 08/27/2022 1. Add new languages. 1.0.1 01/27/2022 1.0.0 01/11/2022
Mechanical Engineering Toolkit version 1.15.0
Updated At: 2026-10-02
Changes: Version History New in 1.15.0:
• Solve for any input: set the result you want — a stress, a critical speed, an efficiency — and the app works the calculation backwards to the input that gives it. Available on 28 calculators.
• Two new tools: Curved Beam in Bending, for hooks, C-frames and chain links, and Frames and Machines, for pinned structures the method of joints can't solve.
• Your own materials everywhere: add, edit or copy fluids, thermal materials and composite laminae as well as solids, and manage them all in My Materials. 1.15.0 6d ago New in 1.14.0:
• Shortcuts and widgets: convert units or open any calculator from Siri, Spotlight, the Shortcuts app or the Action button, and keep your favourite and recent tools on the Home Screen.
• Premium unlocks every tool and removes ads on iPhone, iPad and Mac with one purchase — if you already removed ads, you have it. You can also unlock a single tool by watching one ad.
• A new app icon, made for Liquid Glass.
• The unit converter no longer shows a stray decimal point on round numbers in scientific notation. 1.14.0 Sep 20 New in 1.13.0:
• New Thermodynamics tools: steam tables (IAPWS-IF97), ideal gas processes, the Otto, Diesel and Brayton cycles, and the Rankine cycle — with p–v and T–s diagrams.
• On iPad, results now appear beside your inputs instead of on a page of their own.
• Standard sections and composite presets fill in more calculators, and both fatigue tools draw the Goodman diagram.
• History keeps your last 500 calculations. 1.13.0 Sep 12 New in 1.12.0:
• Beam Load Analysis now covers six support arrangements — cantilever, overhang, propped and fixed-ended — with any number of point, distributed and moment loads.
• New Bolt Grades & Torque reference: ISO 898-1 and SAE J429, with clamp load and tightening torque.
• New Power Screw calculator: torque, efficiency and self-locking.
• Japanese and Chinese PDF reports no longer drop characters. 1.12.0 Sep 7 New in 1.11.0:
• Every tool now explains itself — tap ? in the app bar for what it computes, the formula, and how to read the result. In all six languages.
• Tolerance stack-up: chain any number of dimensions, by worst-case and RSS.
• Standard pipe schedules (ASME B36.10M, NPS 1/8–24) fill Reynolds Number and Pipe Pressure Drop.
• Projects now hold several calculations and export as one PDF report. 1.11.0 Aug 28 New in 1.10.0:
• Vibration — three new Machine Design tools: shaft critical speed, beam natural frequency across five end conditions, and torsional natural frequency for one or two rotors.
• Fill a beam's natural frequency straight from a standard section.
• Remove Ads now available on Android, with purchase restoration.
• Faster launch and fixes to purchase restore. 1.10.0 Aug 21 New in 1.9.0:
• Fluids & Thermal — a new category: Reynolds number, pipe pressure drop, pump and fan power, wall conduction, fin efficiency and heat exchanger sizing.
• Standard Sections — AISC W, IPE and HEB shapes with full properties. Fill a beam straight from a section.
• Built-in fluid and thermal material property lists.
• Fixed PDF export in Chinese and Japanese.
• This update requires iOS 15 or later. 1.9.0 Aug 14 New in 1.8.0:
• Projects — save a calculation's inputs under a name and reopen them any time.
• Export any result as a PDF report or a CSV file.
• One share button, with a choice of format: text, image, PDF, or CSV.
• Choose a light or dark appearance, or follow your device.
• More of the app is translated, and search now works in every language.
• Fixed a crash when naming a project. 1.8.0 Aug 9 New in 1.7.0:
• Drill & tap chart — search any thread for its tap drill and clearance drill size.
• ISO 286 fits & tolerances table — look up hole and shaft limits by diameter and fit.
• Choose your app language from the side menu.
• Now available in German, French, and Japanese. 1.7.0 Aug 2 New in 1.6.0:
• New Machine Design calculators: springs, spur gears, shaft fatigue, bearing life, belt & chain drives, bolted joints, welds, and press fits.
• Added composite failure criteria (Tsai-Hill & Tsai-Wu).
• Smoother experience with animated tool icons and clearer illustrations.
• Better tool recommendations by major. 1.6.0 Jul 24 New in 1.5.0:
• New calculators: Mohr's Circle, Bolted Joint, Combined Loading, and Fatigue Safety Factor.
• New Truss Analysis tool for 2D statics.
• Switch between SI and Imperial units across calculators.
• Find tools faster with major-based recommendations. 1.5.0 Jul 18 New in 1.4.0:
• Analyze beams with new section-property and load-analysis tools, including engineering diagrams.
• Enjoy a cleaner, responsive design with clearer list and grid views.
• Remove ads permanently with a one-time purchase.
• Improved keyboard behavior and advertising privacy controls. 1.4.0 Jul 15 New in 1.3.0:
• Enhanced Calculation History: Now logs your specific input values for every calculation.
• Smart Restore: Tapping a history record automatically pre-fills the calculator with your previous inputs.
• Improved Layout: Reordered tool categories and optimized grid mode for better visibility on all devices.
• Manage History: Swipe to delete individual history records.
• Simplified Favorites: A cleaner, more focused list for your bookmarked tools. 1.3.0 Jul 4 New Calculators — Mechanics of Materials
• Thermal deformation & stress (α, ΔT, L, E)
• Transverse shear stress in beams (τ = VQ/It)
• Angle of twist for circular shafts (φ = TL/GJ)
• Shaft power & torque (find T or P from RPM)
• Failure criteria — Von Mises & Tresca with factor of safety
Calculation Steps
Every result page now shows a full step-by-step breakdown: the formula, values substituted in, and the final result. Tap the card to copy the entire calculation to your clipboard.
Share Results
A share button on every result page lets you send the result and calculation steps via Messages, Mail, Notes, or any other app.
Improvements
• Composite material tools updated with thermal-elastic support
• Rules of Mixture upgraded to transversely isotropic fiber model
• Laminate 3D properties now shows full stiffness and compliance matrices 1.2.0 Jun 24 1. bug fixes. 1.0.6 09/24/2024 1. App optimization 1.0.4 08/27/2022 1. Add new languages. 1.0.1 01/27/2022 1.0.0 01/11/2022
Mechanical Engineering Toolkit version 1.14.0
Updated At: 2026-09-25
Changes: Version History New in 1.14.0:
• Shortcuts and widgets: convert units or open any calculator from Siri, Spotlight, the Shortcuts app or the Action button, and keep your favourite and recent tools on the Home Screen.
• Premium unlocks every tool and removes ads on iPhone, iPad and Mac with one purchase — if you already removed ads, you have it. You can also unlock a single tool by watching one ad.
• A new app icon, made for Liquid Glass.
• The unit converter no longer shows a stray decimal point on round numbers in scientific notation. 1.14.0 5d ago New in 1.13.0:
• New Thermodynamics tools: steam tables (IAPWS-IF97), ideal gas processes, the Otto, Diesel and Brayton cycles, and the Rankine cycle — with p–v and T–s diagrams.
• On iPad, results now appear beside your inputs instead of on a page of their own.
• Standard sections and composite presets fill in more calculators, and both fatigue tools draw the Goodman diagram.
• History keeps your last 500 calculations. 1.13.0 Sep 12 New in 1.12.0:
• Beam Load Analysis now covers six support arrangements — cantilever, overhang, propped and fixed-ended — with any number of point, distributed and moment loads.
• New Bolt Grades & Torque reference: ISO 898-1 and SAE J429, with clamp load and tightening torque.
• New Power Screw calculator: torque, efficiency and self-locking.
• Japanese and Chinese PDF reports no longer drop characters. 1.12.0 Sep 7 New in 1.11.0:
• Every tool now explains itself — tap ? in the app bar for what it computes, the formula, and how to read the result. In all six languages.
• Tolerance stack-up: chain any number of dimensions, by worst-case and RSS.
• Standard pipe schedules (ASME B36.10M, NPS 1/8–24) fill Reynolds Number and Pipe Pressure Drop.
• Projects now hold several calculations and export as one PDF report. 1.11.0 Aug 28 New in 1.10.0:
• Vibration — three new Machine Design tools: shaft critical speed, beam natural frequency across five end conditions, and torsional natural frequency for one or two rotors.
• Fill a beam's natural frequency straight from a standard section.
• Remove Ads now available on Android, with purchase restoration.
• Faster launch and fixes to purchase restore. 1.10.0 Aug 21 New in 1.9.0:
• Fluids & Thermal — a new category: Reynolds number, pipe pressure drop, pump and fan power, wall conduction, fin efficiency and heat exchanger sizing.
• Standard Sections — AISC W, IPE and HEB shapes with full properties. Fill a beam straight from a section.
• Built-in fluid and thermal material property lists.
• Fixed PDF export in Chinese and Japanese.
• This update requires iOS 15 or later. 1.9.0 Aug 14 New in 1.8.0:
• Projects — save a calculation's inputs under a name and reopen them any time.
• Export any result as a PDF report or a CSV file.
• One share button, with a choice of format: text, image, PDF, or CSV.
• Choose a light or dark appearance, or follow your device.
• More of the app is translated, and search now works in every language.
• Fixed a crash when naming a project. 1.8.0 Aug 9 New in 1.7.0:
• Drill & tap chart — search any thread for its tap drill and clearance drill size.
• ISO 286 fits & tolerances table — look up hole and shaft limits by diameter and fit.
• Choose your app language from the side menu.
• Now available in German, French, and Japanese. 1.7.0 Aug 2 New in 1.6.0:
• New Machine Design calculators: springs, spur gears, shaft fatigue, bearing life, belt & chain drives, bolted joints, welds, and press fits.
• Added composite failure criteria (Tsai-Hill & Tsai-Wu).
• Smoother experience with animated tool icons and clearer illustrations.
• Better tool recommendations by major. 1.6.0 Jul 24 New in 1.5.0:
• New calculators: Mohr's Circle, Bolted Joint, Combined Loading, and Fatigue Safety Factor.
• New Truss Analysis tool for 2D statics.
• Switch between SI and Imperial units across calculators.
• Find tools faster with major-based recommendations. 1.5.0 Jul 18 New in 1.4.0:
• Analyze beams with new section-property and load-analysis tools, including engineering diagrams.
• Enjoy a cleaner, responsive design with clearer list and grid views.
• Remove ads permanently with a one-time purchase.
• Improved keyboard behavior and advertising privacy controls. 1.4.0 Jul 15 New in 1.3.0:
• Enhanced Calculation History: Now logs your specific input values for every calculation.
• Smart Restore: Tapping a history record automatically pre-fills the calculator with your previous inputs.
• Improved Layout: Reordered tool categories and optimized grid mode for better visibility on all devices.
• Manage History: Swipe to delete individual history records.
• Simplified Favorites: A cleaner, more focused list for your bookmarked tools. 1.3.0 Jul 4 New Calculators — Mechanics of Materials
• Thermal deformation & stress (α, ΔT, L, E)
• Transverse shear stress in beams (τ = VQ/It)
• Angle of twist for circular shafts (φ = TL/GJ)
• Shaft power & torque (find T or P from RPM)
• Failure criteria — Von Mises & Tresca with factor of safety
Calculation Steps
Every result page now shows a full step-by-step breakdown: the formula, values substituted in, and the final result. Tap the card to copy the entire calculation to your clipboard.
Share Results
A share button on every result page lets you send the result and calculation steps via Messages, Mail, Notes, or any other app.
Improvements
• Composite material tools updated with thermal-elastic support
• Rules of Mixture upgraded to transversely isotropic fiber model
• Laminate 3D properties now shows full stiffness and compliance matrices 1.2.0 Jun 24 1. bug fixes. 1.0.6 09/24/2024 1. App optimization 1.0.4 08/27/2022 1. Add new languages. 1.0.1 01/27/2022 1.0.0 01/11/2022
Mechanical Engineering Toolkit version 1.13.0
Updated At: 2026-09-18
Changes: Version History New in 1.13.0:
• New Thermodynamics tools: steam tables (IAPWS-IF97), ideal gas processes, the Otto, Diesel and Brayton cycles, and the Rankine cycle — with p–v and T–s diagrams.
• On iPad, results now appear beside your inputs instead of on a page of their own.
• Standard sections and composite presets fill in more calculators, and both fatigue tools draw the Goodman diagram.
• History keeps your last 500 calculations. 1.13.0 5d ago New in 1.12.0:
• Beam Load Analysis now covers six support arrangements — cantilever, overhang, propped and fixed-ended — with any number of point, distributed and moment loads.
• New Bolt Grades & Torque reference: ISO 898-1 and SAE J429, with clamp load and tightening torque.
• New Power Screw calculator: torque, efficiency and self-locking.
• Japanese and Chinese PDF reports no longer drop characters. 1.12.0 Sep 7 New in 1.11.0:
• Every tool now explains itself — tap ? in the app bar for what it computes, the formula, and how to read the result. In all six languages.
• Tolerance stack-up: chain any number of dimensions, by worst-case and RSS.
• Standard pipe schedules (ASME B36.10M, NPS 1/8–24) fill Reynolds Number and Pipe Pressure Drop.
• Projects now hold several calculations and export as one PDF report. 1.11.0 Aug 28 New in 1.10.0:
• Vibration — three new Machine Design tools: shaft critical speed, beam natural frequency across five end conditions, and torsional natural frequency for one or two rotors.
• Fill a beam's natural frequency straight from a standard section.
• Remove Ads now available on Android, with purchase restoration.
• Faster launch and fixes to purchase restore. 1.10.0 Aug 21 New in 1.9.0:
• Fluids & Thermal — a new category: Reynolds number, pipe pressure drop, pump and fan power, wall conduction, fin efficiency and heat exchanger sizing.
• Standard Sections — AISC W, IPE and HEB shapes with full properties. Fill a beam straight from a section.
• Built-in fluid and thermal material property lists.
• Fixed PDF export in Chinese and Japanese.
• This update requires iOS 15 or later. 1.9.0 Aug 14 New in 1.8.0:
• Projects — save a calculation's inputs under a name and reopen them any time.
• Export any result as a PDF report or a CSV file.
• One share button, with a choice of format: text, image, PDF, or CSV.
• Choose a light or dark appearance, or follow your device.
• More of the app is translated, and search now works in every language.
• Fixed a crash when naming a project. 1.8.0 Aug 9 New in 1.7.0:
• Drill & tap chart — search any thread for its tap drill and clearance drill size.
• ISO 286 fits & tolerances table — look up hole and shaft limits by diameter and fit.
• Choose your app language from the side menu.
• Now available in German, French, and Japanese. 1.7.0 Aug 2 New in 1.6.0:
• New Machine Design calculators: springs, spur gears, shaft fatigue, bearing life, belt & chain drives, bolted joints, welds, and press fits.
• Added composite failure criteria (Tsai-Hill & Tsai-Wu).
• Smoother experience with animated tool icons and clearer illustrations.
• Better tool recommendations by major. 1.6.0 Jul 24 New in 1.5.0:
• New calculators: Mohr's Circle, Bolted Joint, Combined Loading, and Fatigue Safety Factor.
• New Truss Analysis tool for 2D statics.
• Switch between SI and Imperial units across calculators.
• Find tools faster with major-based recommendations. 1.5.0 Jul 18 New in 1.4.0:
• Analyze beams with new section-property and load-analysis tools, including engineering diagrams.
• Enjoy a cleaner, responsive design with clearer list and grid views.
• Remove ads permanently with a one-time purchase.
• Improved keyboard behavior and advertising privacy controls. 1.4.0 Jul 15 New in 1.3.0:
• Enhanced Calculation History: Now logs your specific input values for every calculation.
• Smart Restore: Tapping a history record automatically pre-fills the calculator with your previous inputs.
• Improved Layout: Reordered tool categories and optimized grid mode for better visibility on all devices.
• Manage History: Swipe to delete individual history records.
• Simplified Favorites: A cleaner, more focused list for your bookmarked tools. 1.3.0 Jul 4 New Calculators — Mechanics of Materials
• Thermal deformation & stress (α, ΔT, L, E)
• Transverse shear stress in beams (τ = VQ/It)
• Angle of twist for circular shafts (φ = TL/GJ)
• Shaft power & torque (find T or P from RPM)
• Failure criteria — Von Mises & Tresca with factor of safety
Calculation Steps
Every result page now shows a full step-by-step breakdown: the formula, values substituted in, and the final result. Tap the card to copy the entire calculation to your clipboard.
Share Results
A share button on every result page lets you send the result and calculation steps via Messages, Mail, Notes, or any other app.
Improvements
• Composite material tools updated with thermal-elastic support
• Rules of Mixture upgraded to transversely isotropic fiber model
• Laminate 3D properties now shows full stiffness and compliance matrices 1.2.0 Jun 24 1. bug fixes. 1.0.6 09/24/2024 1. App optimization 1.0.4 08/27/2022 1. Add new languages. 1.0.1 01/27/2022 1.0.0 01/11/2022
Mechanical Engineering Toolkit version 1.12.0
Updated At: 2026-09-11
Changes: Version History New in 1.12.0:
• Beam Load Analysis now covers six support arrangements — cantilever, overhang, propped and fixed-ended — with any number of point, distributed and moment loads.
• New Bolt Grades & Torque reference: ISO 898-1 and SAE J429, with clamp load and tightening torque.
• New Power Screw calculator: torque, efficiency and self-locking.
• Japanese and Chinese PDF reports no longer drop characters. 1.12.0 3d ago New in 1.11.0:
• Every tool now explains itself — tap ? in the app bar for what it computes, the formula, and how to read the result. In all six languages.
• Tolerance stack-up: chain any number of dimensions, by worst-case and RSS.
• Standard pipe schedules (ASME B36.10M, NPS 1/8–24) fill Reynolds Number and Pipe Pressure Drop.
• Projects now hold several calculations and export as one PDF report. 1.11.0 Aug 28 New in 1.10.0:
• Vibration — three new Machine Design tools: shaft critical speed, beam natural frequency across five end conditions, and torsional natural frequency for one or two rotors.
• Fill a beam's natural frequency straight from a standard section.
• Remove Ads now available on Android, with purchase restoration.
• Faster launch and fixes to purchase restore. 1.10.0 Aug 21 New in 1.9.0:
• Fluids & Thermal — a new category: Reynolds number, pipe pressure drop, pump and fan power, wall conduction, fin efficiency and heat exchanger sizing.
• Standard Sections — AISC W, IPE and HEB shapes with full properties. Fill a beam straight from a section.
• Built-in fluid and thermal material property lists.
• Fixed PDF export in Chinese and Japanese.
• This update requires iOS 15 or later. 1.9.0 Aug 14 New in 1.8.0:
• Projects — save a calculation's inputs under a name and reopen them any time.
• Export any result as a PDF report or a CSV file.
• One share button, with a choice of format: text, image, PDF, or CSV.
• Choose a light or dark appearance, or follow your device.
• More of the app is translated, and search now works in every language.
• Fixed a crash when naming a project. 1.8.0 Aug 9 New in 1.7.0:
• Drill & tap chart — search any thread for its tap drill and clearance drill size.
• ISO 286 fits & tolerances table — look up hole and shaft limits by diameter and fit.
• Choose your app language from the side menu.
• Now available in German, French, and Japanese. 1.7.0 Aug 2 New in 1.6.0:
• New Machine Design calculators: springs, spur gears, shaft fatigue, bearing life, belt & chain drives, bolted joints, welds, and press fits.
• Added composite failure criteria (Tsai-Hill & Tsai-Wu).
• Smoother experience with animated tool icons and clearer illustrations.
• Better tool recommendations by major. 1.6.0 Jul 24 New in 1.5.0:
• New calculators: Mohr's Circle, Bolted Joint, Combined Loading, and Fatigue Safety Factor.
• New Truss Analysis tool for 2D statics.
• Switch between SI and Imperial units across calculators.
• Find tools faster with major-based recommendations. 1.5.0 Jul 18 New in 1.4.0:
• Analyze beams with new section-property and load-analysis tools, including engineering diagrams.
• Enjoy a cleaner, responsive design with clearer list and grid views.
• Remove ads permanently with a one-time purchase.
• Improved keyboard behavior and advertising privacy controls. 1.4.0 Jul 15 New in 1.3.0:
• Enhanced Calculation History: Now logs your specific input values for every calculation.
• Smart Restore: Tapping a history record automatically pre-fills the calculator with your previous inputs.
• Improved Layout: Reordered tool categories and optimized grid mode for better visibility on all devices.
• Manage History: Swipe to delete individual history records.
• Simplified Favorites: A cleaner, more focused list for your bookmarked tools. 1.3.0 Jul 4 New Calculators — Mechanics of Materials
• Thermal deformation & stress (α, ΔT, L, E)
• Transverse shear stress in beams (τ = VQ/It)
• Angle of twist for circular shafts (φ = TL/GJ)
• Shaft power & torque (find T or P from RPM)
• Failure criteria — Von Mises & Tresca with factor of safety
Calculation Steps
Every result page now shows a full step-by-step breakdown: the formula, values substituted in, and the final result. Tap the card to copy the entire calculation to your clipboard.
Share Results
A share button on every result page lets you send the result and calculation steps via Messages, Mail, Notes, or any other app.
Improvements
• Composite material tools updated with thermal-elastic support
• Rules of Mixture upgraded to transversely isotropic fiber model
• Laminate 3D properties now shows full stiffness and compliance matrices 1.2.0 Jun 24 1. bug fixes. 1.0.6 09/24/2024 1. App optimization 1.0.4 08/27/2022 1. Add new languages. 1.0.1 01/27/2022 1.0.0 01/11/2022
Mechanical Engineering Toolkit version 1.11.0
Updated At: 2026-09-04
Changes: Version History New in 1.11.0:
• Every tool now explains itself — tap ? in the app bar for what it computes, the formula, and how to read the result. In all six languages.
• Tolerance stack-up: chain any number of dimensions, by worst-case and RSS.
• Standard pipe schedules (ASME B36.10M, NPS 1/8–24) fill Reynolds Number and Pipe Pressure Drop.
• Projects now hold several calculations and export as one PDF report. 1.11.0 6d ago New in 1.10.0:
• Vibration — three new Machine Design tools: shaft critical speed, beam natural frequency across five end conditions, and torsional natural frequency for one or two rotors.
• Fill a beam's natural frequency straight from a standard section.
• Remove Ads now available on Android, with purchase restoration.
• Faster launch and fixes to purchase restore. 1.10.0 Aug 21 New in 1.9.0:
• Fluids & Thermal — a new category: Reynolds number, pipe pressure drop, pump and fan power, wall conduction, fin efficiency and heat exchanger sizing.
• Standard Sections — AISC W, IPE and HEB shapes with full properties. Fill a beam straight from a section.
• Built-in fluid and thermal material property lists.
• Fixed PDF export in Chinese and Japanese.
• This update requires iOS 15 or later. 1.9.0 Aug 14 New in 1.8.0:
• Projects — save a calculation's inputs under a name and reopen them any time.
• Export any result as a PDF report or a CSV file.
• One share button, with a choice of format: text, image, PDF, or CSV.
• Choose a light or dark appearance, or follow your device.
• More of the app is translated, and search now works in every language.
• Fixed a crash when naming a project. 1.8.0 Aug 9 New in 1.7.0:
• Drill & tap chart — search any thread for its tap drill and clearance drill size.
• ISO 286 fits & tolerances table — look up hole and shaft limits by diameter and fit.
• Choose your app language from the side menu.
• Now available in German, French, and Japanese. 1.7.0 Aug 2 New in 1.6.0:
• New Machine Design calculators: springs, spur gears, shaft fatigue, bearing life, belt & chain drives, bolted joints, welds, and press fits.
• Added composite failure criteria (Tsai-Hill & Tsai-Wu).
• Smoother experience with animated tool icons and clearer illustrations.
• Better tool recommendations by major. 1.6.0 Jul 24 New in 1.5.0:
• New calculators: Mohr's Circle, Bolted Joint, Combined Loading, and Fatigue Safety Factor.
• New Truss Analysis tool for 2D statics.
• Switch between SI and Imperial units across calculators.
• Find tools faster with major-based recommendations. 1.5.0 Jul 18 New in 1.4.0:
• Analyze beams with new section-property and load-analysis tools, including engineering diagrams.
• Enjoy a cleaner, responsive design with clearer list and grid views.
• Remove ads permanently with a one-time purchase.
• Improved keyboard behavior and advertising privacy controls. 1.4.0 Jul 15 New in 1.3.0:
• Enhanced Calculation History: Now logs your specific input values for every calculation.
• Smart Restore: Tapping a history record automatically pre-fills the calculator with your previous inputs.
• Improved Layout: Reordered tool categories and optimized grid mode for better visibility on all devices.
• Manage History: Swipe to delete individual history records.
• Simplified Favorites: A cleaner, more focused list for your bookmarked tools. 1.3.0 Jul 4 New Calculators — Mechanics of Materials
• Thermal deformation & stress (α, ΔT, L, E)
• Transverse shear stress in beams (τ = VQ/It)
• Angle of twist for circular shafts (φ = TL/GJ)
• Shaft power & torque (find T or P from RPM)
• Failure criteria — Von Mises & Tresca with factor of safety
Calculation Steps
Every result page now shows a full step-by-step breakdown: the formula, values substituted in, and the final result. Tap the card to copy the entire calculation to your clipboard.
Share Results
A share button on every result page lets you send the result and calculation steps via Messages, Mail, Notes, or any other app.
Improvements
• Composite material tools updated with thermal-elastic support
• Rules of Mixture upgraded to transversely isotropic fiber model
• Laminate 3D properties now shows full stiffness and compliance matrices 1.2.0 Jun 24 1. bug fixes. 1.0.6 09/24/2024 1. App optimization 1.0.4 08/27/2022 1. Add new languages. 1.0.1 01/27/2022 1.0.0 01/11/2022
Mechanical Engineering Toolkit version 1.10.0
Updated At: 2026-08-22
Changes: Version History New in 1.10.0:
• Vibration — three new Machine Design tools: shaft critical speed, beam natural frequency across five end conditions, and torsional natural frequency for one or two rotors.
• Fill a beam's natural frequency straight from a standard section.
• Remove Ads now available on Android, with purchase restoration.
• Faster launch and fixes to purchase restore. 1.10.0 18h ago New in 1.9.0:
• Fluids & Thermal — a new category: Reynolds number, pipe pressure drop, pump and fan power, wall conduction, fin efficiency and heat exchanger sizing.
• Standard Sections — AISC W, IPE and HEB shapes with full properties. Fill a beam straight from a section.
• Built-in fluid and thermal material property lists.
• Fixed PDF export in Chinese and Japanese.
• This update requires iOS 15 or later. 1.9.0 Aug 14 New in 1.8.0:
• Projects — save a calculation's inputs under a name and reopen them any time.
• Export any result as a PDF report or a CSV file.
• One share button, with a choice of format: text, image, PDF, or CSV.
• Choose a light or dark appearance, or follow your device.
• More of the app is translated, and search now works in every language.
• Fixed a crash when naming a project. 1.8.0 Aug 9 New in 1.7.0:
• Drill & tap chart — search any thread for its tap drill and clearance drill size.
• ISO 286 fits & tolerances table — look up hole and shaft limits by diameter and fit.
• Choose your app language from the side menu.
• Now available in German, French, and Japanese. 1.7.0 Aug 2 New in 1.6.0:
• New Machine Design calculators: springs, spur gears, shaft fatigue, bearing life, belt & chain drives, bolted joints, welds, and press fits.
• Added composite failure criteria (Tsai-Hill & Tsai-Wu).
• Smoother experience with animated tool icons and clearer illustrations.
• Better tool recommendations by major. 1.6.0 Jul 24 New in 1.5.0:
• New calculators: Mohr's Circle, Bolted Joint, Combined Loading, and Fatigue Safety Factor.
• New Truss Analysis tool for 2D statics.
• Switch between SI and Imperial units across calculators.
• Find tools faster with major-based recommendations. 1.5.0 Jul 18 New in 1.4.0:
• Analyze beams with new section-property and load-analysis tools, including engineering diagrams.
• Enjoy a cleaner, responsive design with clearer list and grid views.
• Remove ads permanently with a one-time purchase.
• Improved keyboard behavior and advertising privacy controls. 1.4.0 Jul 15 New in 1.3.0:
• Enhanced Calculation History: Now logs your specific input values for every calculation.
• Smart Restore: Tapping a history record automatically pre-fills the calculator with your previous inputs.
• Improved Layout: Reordered tool categories and optimized grid mode for better visibility on all devices.
• Manage History: Swipe to delete individual history records.
• Simplified Favorites: A cleaner, more focused list for your bookmarked tools. 1.3.0 Jul 4 New Calculators — Mechanics of Materials
• Thermal deformation & stress (α, ΔT, L, E)
• Transverse shear stress in beams (τ = VQ/It)
• Angle of twist for circular shafts (φ = TL/GJ)
• Shaft power & torque (find T or P from RPM)
• Failure criteria — Von Mises & Tresca with factor of safety
Calculation Steps
Every result page now shows a full step-by-step breakdown: the formula, values substituted in, and the final result. Tap the card to copy the entire calculation to your clipboard.
Share Results
A share button on every result page lets you send the result and calculation steps via Messages, Mail, Notes, or any other app.
Improvements
• Composite material tools updated with thermal-elastic support
• Rules of Mixture upgraded to transversely isotropic fiber model
• Laminate 3D properties now shows full stiffness and compliance matrices 1.2.0 Jun 24 1. bug fixes. 1.0.6 09/24/2024 1. App optimization 1.0.4 08/27/2022 1. Add new languages. 1.0.1 01/27/2022 1.0.0 01/11/2022
Mechanical Engineering Toolkit version 1.6.0
Updated At: 2026-07-27
Changes: Version History New in 1.6.0:
• New Machine Design calculators: springs, spur gears, shaft fatigue, bearing life, belt & chain drives, bolted joints, welds, and press fits.
• Added composite failure criteria (Tsai-Hill & Tsai-Wu).
• Smoother experience with animated tool icons and clearer illustrations.
• Better tool recommendations by major. 1.6.0 3d ago New in 1.5.0:
• New calculators: Mohr's Circle, Bolted Joint, Combined Loading, and Fatigue Safety Factor.
• New Truss Analysis tool for 2D statics.
• Switch between SI and Imperial units across calculators.
• Find tools faster with major-based recommendations. 1.5.0 Jul 18 New in 1.4.0:
• Analyze beams with new section-property and load-analysis tools, including engineering diagrams.
• Enjoy a cleaner, responsive design with clearer list and grid views.
• Remove ads permanently with a one-time purchase.
• Improved keyboard behavior and advertising privacy controls. 1.4.0 Jul 15 New in 1.3.0:
• Enhanced Calculation History: Now logs your specific input values for every calculation.
• Smart Restore: Tapping a history record automatically pre-fills the calculator with your previous inputs.
• Improved Layout: Reordered tool categories and optimized grid mode for better visibility on all devices.
• Manage History: Swipe to delete individual history records.
• Simplified Favorites: A cleaner, more focused list for your bookmarked tools. 1.3.0 Jul 4 New Calculators — Mechanics of Materials
• Thermal deformation & stress (α, ΔT, L, E)
• Transverse shear stress in beams (τ = VQ/It)
• Angle of twist for circular shafts (φ = TL/GJ)
• Shaft power & torque (find T or P from RPM)
• Failure criteria — Von Mises & Tresca with factor of safety
Calculation Steps
Every result page now shows a full step-by-step breakdown: the formula, values substituted in, and the final result. Tap the card to copy the entire calculation to your clipboard.
Share Results
A share button on every result page lets you send the result and calculation steps via Messages, Mail, Notes, or any other app.
Improvements
• Composite material tools updated with thermal-elastic support
• Rules of Mixture upgraded to transversely isotropic fiber model
• Laminate 3D properties now shows full stiffness and compliance matrices 1.2.0 Jun 24 1. bug fixes. 1.0.6 09/24/2024 1. App optimization 1.0.4 08/27/2022 1. Add new languages. 1.0.1 01/27/2022 1.0.0 01/11/2022
Mechanical Engineering Toolkit version 1.5.0
Updated At: 2026-07-20
Changes: Version History New in 1.5.0:
• New calculators: Mohr's Circle, Bolted Joint, Combined Loading, and Fatigue Safety Factor.
• New Truss Analysis tool for 2D statics.
• Switch between SI and Imperial units across calculators.
• Find tools faster with major-based recommendations. 1.5.0 1d ago New in 1.4.0:
• Analyze beams with new section-property and load-analysis tools, including engineering diagrams.
• Enjoy a cleaner, responsive design with clearer list and grid views.
• Remove ads permanently with a one-time purchase.
• Improved keyboard behavior and advertising privacy controls. 1.4.0 4d ago New in 1.3.0:
• Enhanced Calculation History: Now logs your specific input values for every calculation.
• Smart Restore: Tapping a history record automatically pre-fills the calculator with your previous inputs.
• Improved Layout: Reordered tool categories and optimized grid mode for better visibility on all devices.
• Manage History: Swipe to delete individual history records.
• Simplified Favorites: A cleaner, more focused list for your bookmarked tools. 1.3.0 Jul 4 New Calculators — Mechanics of Materials
• Thermal deformation & stress (α, ΔT, L, E)
• Transverse shear stress in beams (τ = VQ/It)
• Angle of twist for circular shafts (φ = TL/GJ)
• Shaft power & torque (find T or P from RPM)
• Failure criteria — Von Mises & Tresca with factor of safety
Calculation Steps
Every result page now shows a full step-by-step breakdown: the formula, values substituted in, and the final result. Tap the card to copy the entire calculation to your clipboard.
Share Results
A share button on every result page lets you send the result and calculation steps via Messages, Mail, Notes, or any other app.
Improvements
• Composite material tools updated with thermal-elastic support
• Rules of Mixture upgraded to transversely isotropic fiber model
• Laminate 3D properties now shows full stiffness and compliance matrices 1.2.0 Jun 24 1. bug fixes. 1.0.6 09/24/2024 1. App optimization 1.0.4 08/27/2022 1. Add new languages. 1.0.1 01/27/2022 1.0.0 01/11/2022
