Power Converter
Rate of energy - watts to horsepower.
Enter a value above to convert between kW and hp.
How to convert power units
Power is based on the watt (one watt is one joule per second). One kilowatt is 1,000 W. Two kinds of "horsepower" exist: mechanical horsepower is 745.7 W and metric horsepower (PS) is 735.5 W - close but not equal, so the tool labels both.
Worked example
100 mechanical horsepower is 100 × 745.6998716 = 74,570 W = 74.57 kW. Conversely, one kilowatt is 1.341 hp.
How many watts are in one horsepower?
One mechanical horsepower equals 745.6998716 watts. One metric horsepower (PS) equals 735.49875 watts, one kilowatt equals 1,000 watts, and one BTU per hour equals 0.293071 watts.
When you'll use a power converter
Power conversion comes up with car and engine output (horsepower, PS, kilowatts), appliances and motors (watts, kilowatts), HVAC (BTU per hour), and electrical work. The table above lists your value in all 6 supported units at once.