Power Converter
The watt (W) is the base power unit here, so every one of the 6 units below, including kilowatts and megawatts, converts through it. Enter a value, pick your units, and the result updates instantly, all in your browser.
All power units
| Unit | Symbol | 1 unit in watts |
|---|---|---|
| Watt | W | 1 |
| Kilowatt | kW | 1000 |
| Megawatt | MW | 1000000 |
| Horsepower | hp | 745.7 |
| Metric horsepower | PS | 735.5 |
| BTU per hour | BTU/h | 0.293071 |
All power conversions
Power converters handle watts, kilowatts, horsepower and BTU per hour. The watt is the SI base unit of power, and mechanical horsepower is defined precisely against it.
Frequently asked questions
How many watts are in one horsepower?
One mechanical horsepower equals about 745.7 watts. Metric horsepower (PS) is slightly less, at about 735.5 watts.
What is the difference between hp and PS?
Both measure power. Mechanical horsepower (hp) is defined against imperial units and equals about 745.7 watts, while metric horsepower (PS) equals about 735.5 watts. Car specs sometimes mix them up.
How do I convert kilowatts to horsepower?
Divide kilowatts by 0.7457 to get mechanical horsepower, or multiply horsepower by that figure to go the other way. So 100 kW is about 134 hp.