Brake Horsepower Calculator
A free, browser-based calculator. Runs entirely in your browser — no sign up, nothing stored.
100% FreeRuns in your browserBasic
Enter Values
Enter your values and press Calculate to see results.
How to use this calculator
- Enter the torque (N·m) and engine speed (rpm).
- Read the power in kW and hp.
How it works
Power (kW) = torque × rpm ÷ 9549; multiply by 1.341 for horsepower.
Worked example
200 N·m at 3000 rpm. ≈ 62.8 kW (84.3 hp).
Common mistakes
- Mixing pound-feet with newton-metres — convert first.
- Reading peak torque and peak power at the same rpm (they rarely coincide).
Frequently asked questions
Is this crank or wheel power?
It reflects whatever torque you enter — quote crank torque for crank power, wheel torque for wheel power.
Related tools
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.