Mechanical Engineering Calc

Work through stress, beam, machine-design and heat-flow problems with 107 engineering tools. Mechanical Engineering Toolkit brings formulas, diagrams, substituted values and units together so you can review the calculation and understand the result.

Follow the calculation

Enter your geometry, loads and material values, then see the equation and calculation steps. Worked examples provide starting inputs you can change for your own problem. Tool information explains the model and its assumptions.

Handle everyday engineering tasks

• Check stress, strain, beam bending, deflection, torsion and buckling.

• Work with springs, gears, bearings, shafts, bolts and welded joints.

• Calculate pipe pressure drop, pump power and heat transfer through walls, fins and heat exchangers.

• Explore elastic and composite material properties, thermodynamic cycles and steam tables.

Keep reference data close

Look up ISO 286 fits and tolerances, drill and tap sizes, pipe schedules and fastener dimensions. Review dimensions and section properties for AISC W, IPE and HEB profiles without leaving the app.

Save, compare and report

Find tools by name or category and keep favorites within reach. Reopen calculations from history, organize them into named projects and compare recorded inputs and results. Share calculations as text or images, or export CSV data and PDF reports.

Use the units you need

Switch between SI and Imperial units and use the engineering unit converter. Available tools calculate offline without an account, making them useful at a desk, in class or away from a network.

Free tools and optional unlocks

21 tools are available without a purchase or rewarded ad. Unlock another tool on this device by watching an optional rewarded ad, or choose Premium to unlock every tool and remove ads with one purchase. There is no subscription. Ads, purchases and new ad unlocks need an internet connection; available calculations can be used offline.

The app interface is available in English, German, French, Japanese, Simplified Chinese and Traditional Chinese.