Q:

# How many watts equal 1 horsepower?

A:

The question of how many watts equal 1 horsepower depends on how you define horsepower. One mechanical horsepower unit is approximately equal to 745.7 watts. One electrical horsepower, used for rating electrical motors, is equal to 746 watts.

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Horse power was originally defined as the power output of a single common draft animal. One horse could sustain the work of 1 horsepower. As steam engines began to supplant horses during the Industrial Revolution, the unit "horsepower" came in to use to define the power output of mechanical and then electrical engines. James Watt, an inventor of the late 18th and early 19th century, originally developed the horsepower unit; in 1882, the SI unit of power was named the watt in his honor.

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## Related Questions

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One kilometer is equal to 0.6214 mile, while 1 mile equals 1.6093 kilometers. One kilometer is also equal to 1093.61 yards, which converts to 3280.84 feet.

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One pound is equal to approximately 0.45359 kilograms. One kilogram is approximately equal to 2.2046 pounds. Kilograms are a unit of measurement in the International System of Units or the metric system. Pounds are a unit of measurement in the customary system of units or the imperial unit system.

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The answer to how many CCs equal one horsepower can only be estimated at 1HP per 15-25 CCs. There are too many variables to enable an exact calculation.