Engine horsepower, torque and BHP calculator.
Calculate mechanical power from torque and RPM, with newton metres, pound-feet, kilowatts and BHP.
Engine horsepower, torque and BHP inputs
This is shaft mechanical power from the torque and RPM values you enter. It does not estimate wheel power, acceleration or a manufacturer-rated output.
Method: Mechanical power in watts equals torque in newton metres × angular speed in radians per second. BHP and kW are derived from that output.
Inputs used: Torque = 200 N·m; Engine speed = 3,000 RPM
Assumptions: The result uses the values, units and options shown in the input snapshot.
Scope and warnings: This is shaft mechanical power from the torque and RPM values you enter. It does not estimate wheel power, acceleration or a manufacturer-rated output. Rounding and excluded real-world terms can make an external result differ.
How this engine horsepower, torque and bhp calculator works
Mechanical power in watts equals torque in newton metres × angular speed in radians per second. BHP and kW are derived from that output.
A worked example
At 200 N·m and 3,000 RPM, mechanical output is about 62.83 kW or 84.25 BHP.
Is this the vehicle’s rated engine output?
Not necessarily. Rated output depends on where and how torque is measured, drivetrain losses, temperature and manufacturer test conditions.
Calculations run on your device. Review your results before exporting or sharing them.
Torque and RPM must describe the same operating point
Power comes from the torque at a particular engine speed. Use torque measured or quoted at the RPM you enter rather than peak torque and peak-power RPM from different points.
The output is mechanical shaft power. Drivetrain loss, rolling resistance, gearing, temperature and dyno method affect power at the wheels or the published vehicle figure.
Published by ToolMitra — methods and editorial approach.