Convert power instantly — type a value, pick your units, and every other common unit updates live below. 100% free, runs entirely in your browser, no sign-up.
Every unit below updates live from the value you enter in the "From" field above.
Power is energy per unit time, which is why its base unit (the watt) is defined as one joule per second. Horsepower predates the watt by a century — James Watt coined it to market steam engines by comparing them to actual horses — and this converter uses the standard "mechanical horsepower" (745.7 W); Europe's metric horsepower is very slightly different and not used here to keep the unit list simple.
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