Automotive
Horsepower from torque
Estimate mechanical horsepower from torque and rotational speed.
Calculators / Automotive / Horsepower and kilowatt converter
Horsepower and kilowatt converter calculator
Convert power between kilowatts, mechanical horsepower and metric horsepower.
On this page
Power100kW
Mechanical horsepower134.1hp
Metric horsepower135.96PS
Calculator controls
How to calculate
Convert power between kilowatts, mechanical horsepower and metric horsepower.
kW = mechanical hp × 0.7456998715822702 = PS × 0.73549875.
Worked example
Power: 100; Input unit: 1.
Power: 100 kW; Mechanical horsepower: 134.1 hp; Metric horsepower: 135.96 PS.
Assumptions and limits
Convert power between kilowatts, mechanical horsepower and metric horsepower. PS is not identical to mechanical hp. This changes units, not an engine rating from crankshaft power to wheel power.
Results are rounded for display; calculations use unrounded values. Read our calculation methodology.
Understanding the result
Convert power between kilowatts, mechanical horsepower and metric horsepower. PS is not identical to mechanical hp. This changes units, not an engine rating from crankshaft power to wheel power.
When this tool is useful
kW = mechanical hp × 0.7456998715822702 = PS × 0.73549875.
Understanding your inputs
| Input | What to enter |
|---|---|
| Power | Enter a number of at least 0 and no more than 1000000000000. |
| Input unit | Enter one of the available options. |
Frequently asked questions
Are mechanical horsepower and metric horsepower identical?
No. Mechanical hp and metric PS use different definitions, so their numbers differ slightly for the same kilowatt value. A unit conversion also does not account for drivetrain losses.