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Horsepower to Watt

Convert horsepower (hp) to watt (W) — with the exact factor, a quick-reference table and a free converter that works offline.

1 hp = 745.6999 W

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Open the free converter with this conversion pre-loaded — no sign-up, works offline after first load.

Conversion table

Horsepower (hp)Watt (W)
1 hp745.6999 W
2 hp1,491.4 W
5 hp3,728.499 W
10 hp7,456.999 W
20 hp14,914 W
50 hp37,284.99 W
100 hp74,569.99 W
500 hp372,849.9 W

How the conversion works

Both units measure power. One horsepower equals exactly 745.6999 W, so multiply by that factor to convert. Mechanical (imperial) horsepower.

FAQ

How many watts in a horsepower?

1 hp = 745.6999 W.

How do I convert horsepower to watt?

Multiply the horsepower value by 745.6999. For example, 10 hp × 745.6999 = 7,456.999 W.

Where does the factor come from?

The conversion factor is defined in NIST SP 811; both units are power units converted through watt.

Related conversions

Watt to Horsepower Kilowatt to Horsepower Horsepower to Kilowatt

Conversion factors: NIST SP 811. Computed by the same engine that powers the app.

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