Torque Calculator

Torque measures rotational force - how hard an engine can twist its output shaft. It is calculated from force applied at a distance from the pivot point. This calculator computes torque from horsepower/RPM and converts between units (Nm, lb-ft, kg-m).

1. 1

   Enter Horsepower

   Input engine horsepower output

2. 2

   Enter RPM

   Input engine speed in revolutions per minute

3. 3

   Calculate Torque

   See calculated torque at that power/RPM point

4. 4

   View Conversions

   See equivalent torque in Nm, lb-ft, and kg-m

• 1

  High torque at low RPM provides better acceleration and towing capability

• 2

  Diesel engines typically produce more torque than gasoline engines of similar size

• 3

  Electric motors produce maximum torque from 0 RPM

• 4

  Transmission gear multiplication increases torque at the wheels

• 5

  Turbocharged engines produce more torque per liter of displacement

• Thinking more torque always means faster acceleration (power matters too)

• Confusing engine torque with wheel torque (gearing multiplies)

• Mixing up Nm and lb-ft when reading specifications

• Ignoring the RPM at which peak torque is produced