Convert engine torque and RPM into horsepower, kilowatts and metric PS.
The method behind this calculator
Enter torque in pound-feet and engine speed in RPM to get horsepower and its equivalents. It uses the standard torque-power relationship.
How to use it
- Enter your figures in the fields provided.
- The result updates as you type.
- Review the breakdown below the main number.
The maths behind it
horsepower = torque × RPM ÷ 5252
Worked example
On the values this calculator opens with, the horsepower is 285.6. Underneath, Kilowatts comes out at 213 kW and Metric PS at 289.6 PS. Change any field and every figure updates as you type.
Frequently asked questions
How is horsepower found from torque?
Multiply torque by RPM and divide by 5,252.
What’s the difference between hp, kW and PS?
Different power units: 1 hp ≈ 0.746 kW ≈ 1.014 PS.