⚙️Mechanical Engineering Calculators

Gears, springs, shafts, bearings, heat transfer. 9 free tools with transparent formulas and quick results.

Calculate gear ratio, output speed and torque for a simple spur gear pair. Instant results with AI explanation...

Calculate V-belt or flat-belt drive length, velocity ratio, output speed, belt speed and wrap angle. Free mech...

Heat Transfer (Conduction)

Calculate heat transfer rate through a flat wall using Fourier's Law. Returns heat flux and thermal resistance...

Calculate helical compression spring stiffness from wire diameter, coil diameter and active coils. Includes sp...

Shaft Stress Analysis

Calculate torsional and bending stresses in a solid circular shaft under combined loading. Returns von Mises s...

Bearing Life (L10)

Calculate L10 rated life for rolling element bearings per ISO 281. Returns life in hours and years. Free mecha...

Thermal Expansion

Calculate linear thermal expansion of pipes, rods and structures. Enter coefficient of thermal expansion, leng...

Engine Displacement

Calculate engine displacement in litres and cc, swept volume per cylinder, and compression ratio from bore, st...

Flywheel Energy Storage

Calculate flywheel stored kinetic energy in kJ and Wh, moment of inertia and rim speed from mass, radius and r...