Convert horsepower to kilowatts, watts, metric horsepower, mechanical horsepower, electrical horsepower, and other power units. You can also estimate horsepower from torque and RPM for automotive and engine comparisons.
Horsepower to kilowatts:
kW = hp × 0.745699872
Kilowatts to horsepower:
hp = kW ÷ 0.745699872
Horsepower to watts:
W = hp × 745.699872
Torque to horsepower:
hp = lb-ft × RPM ÷ 5252
Horsepower conversions are useful for vehicle specs, engine output, dyno results, motorcycles, boats, electric motors, generators, machinery, power tools, tractors, and comparing horsepower with kilowatts.
Use this converter when a vehicle, motor, or equipment spec lists power in a different unit.
Your result shows the entered power value converted into the selected unit. The converter also displays horsepower, kilowatts, watts, metric horsepower, and an estimated horsepower from torque and RPM when those fields are entered.
Engine horsepower can be measured differently depending on whether the rating is crank horsepower, wheel horsepower, gross horsepower, net horsepower, or dyno-tested output.
Multiply horsepower by 0.745699872. For example, 300 hp is about 223.71 kW.
Divide kilowatts by 0.745699872. For example, 200 kW is about 268.2 hp.
Use horsepower = torque in lb-ft × RPM ÷ 5252. If torque is in Nm, convert it to lb-ft first.
No. Metric horsepower is slightly smaller than mechanical horsepower, so the values are close but not identical.
Crank horsepower is measured at the engine. Wheel horsepower is measured at the wheels and is usually lower because of drivetrain loss.