Power Converter

Convert watts, kilowatts, horsepower, BTU per hour and more.

Watts (W):

Kilowatts (kW):

Horsepower (hp):

BTU / hour:

–MW

–Metric hp

–ft·lb/s

–cal/s

How to use

Enter power in any unit — every other unit converts instantly; everything runs in your browser.

How many watts in 1 horsepower?

1 mechanical hp = 745.7 W; 1 metric hp = 735.5 W.

What is BTU/hr?

British Thermal Units per hour — common for AC and heater ratings; 1 W ≈ 3.412 BTU/hr.

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