Watts to Horsepower Converter

Convert watts to horsepower. 1000 W โ‰ˆ 1.341 hp (mechanical).

Inputs

Result

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General calculation reads

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How to use this calculator

  • Enter watts.
  • Pick HP convention.
  • Read horsepower.

About this calculator

Inverse of horsepower-to-watts. Most consumer-grade motor specs are in W or kW; converting to hp gives a more familiar number for US car-and-tool buyers. A 1500 W vacuum cleaner is โ‰ˆ 2 hp; a 100 kW car engine is โ‰ˆ 134 hp.

Frequently asked

Why does my US car spec say "horsepower" but European says "kW"?+
Just regional convention. Both measure the same thing โ€” engine power. 100 hp โ‰ˆ 75 kW.
What's a "kilowatt-hour"?+
Energy, not power. 1 kWh = 1 kW ร— 1 hour = 3.6 MJ. Used on electric bills.
Are car horsepower numbers honest?+
Mostly yes for SAE-rated US cars. Some manufacturers historically inflated; SAE 1995+ standardized testing.
Brake horsepower vs flywheel horsepower?+
BHP is at the engine (no drivetrain loss); wheel hp is what reaches the ground (~80-85% of BHP for typical cars).
Quick mental conversion?+
kW ร— 1.34 โ‰ˆ hp. hp ร— 0.75 โ‰ˆ kW.

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