Unit Converters
Power Converter
Convert between watts, kilowatts, and horsepower.
FreeNo sign-upWorks in your browser
Watt (W)
1
Kilowatt (kW)
0.001
Megawatt (MW)
0.000001
Horsepower (hp)
0.001341
BTU/hour
3.412142
About the Power Converter
Convert power units free — hp to kW, kW to hp, watts to horsepower, and watts to kW — with precise factors (1 mechanical hp ≈ 745.7 W ≈ 0.746 kW). Covers watts, kilowatts, megawatts, horsepower, and BTU/hour, so it handles car engine specs, generators, air conditioners, and electrical loads alike.
How to use the Power Converter
- 1Enter a value.
- 2Pick the unit to convert from.
- 3Read every other unit and copy.
Frequently asked questions
How many watts in 1 horsepower?
1 mechanical hp ≈ 745.7 watts.
How many kW in 1 hp?
About 0.746 kW.
Is metric horsepower different?
Yes — metric hp (PS) ≈ 735.5 W, slightly less than mechanical hp (745.7 W). Car specs from Europe often quote PS.