Mechanics & Actuators Calculator

Motor Gear Ratio, Speed & Torque Calculator

Calculate how planetary and spur gearboxes multiply torque and reduce angular velocity for robotic arms and mobile robot drive wheels.

Motor No-Load RPM

Motor Stall Torque (Nm)

Gearbox Reduction (X:1)

Wheel Radius (cm)

Efficiency (0.5-0.95)

Output Shaft Speed

200.0 RPM

Output Torque

1.27 Nm

Linear Rover Speed

0.84 m/s

Speed (km/h)

3.0 km/h

Output RPM = Motor RPM / Gear Ratio. Output Torque = Motor Torque · Gear Ratio · Efficiency. Linear Velocity v = (Output RPM · 2π · r_wheel) / 60.