Torque Calculator

How to calculate torque

1. Choose whether you know the force and lever arm, or the power and speed.
2. Enter the values.
3. The torque appears in N·m, with lbf·ft, lbf·in and kgf·m.

Frequently asked questions

What is the formula?

Torque = force × lever arm, or torque = power / angular speed, where angular speed = 2π × RPM / 60.

How do I convert N·m to lbf·ft?

Multiply by 0.7376. 100 N·m is about 73.76 lbf·ft.

How are torque and power related?

Power = torque × angular speed. At 3,000 RPM, a torque of 10 N·m is about 3.14 kW.