How does the Horsepower Converter work?

1 HP (mechanical) = 745.7 W Then: 1 CV/PS (metric) = 735.5 W Then: Power (W) = Torque (N·m) × Angular velocity (rad/s) Then: kW = HP × 0.7457; HP = kW × 1.341.

Can you give an example of how to use the Horsepower Converter?

Example: Input 200 HP engine gives a result of 149.1 kW or 202.8 CV (metric horsepower).

Is the Horsepower Converter free to use?

Yes — completely free with no registration, download, or subscription required. All calculations happen instantly in your browser.

How accurate is the Horsepower Converter?

Our Horsepower Converter uses verified mathematical formulas and is accurate to multiple decimal places. Results are calculated in real-time using the same methods used by professionals.

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Horsepower Converter

Value

From

Horsepower (hp) is a unit of power originally defined by James Watt to compare steam engine output to horse work. One mechanical horsepower = 745.7 watts. Metric horsepower (CV/PS) = 735.5 watts.

Symbol	Name	Unit	Description
HP	Horsepower	hp	—
τ	Torque	lb-ft	—
RPM	Revolutions Per Minute	rev/min	—

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Pro Tip

Electric vehicles use kW for power ratings. Multiply by 1.34 to compare to ICE vehicle horsepower ratings.

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Did You Know?

James Watt defined 1 horsepower as 33,000 foot-pounds per minute after observing mill horses in the 1780s.

References

›NIST — Horsepower

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