Convert mechanical horsepower to kilowatts

1 hp=0.7457kW

Use the converter below to change any mechanical horsepower value into kilowatts instantly — with formula, conversion table, and real-world examples.

You have

Equals

0.7457

Conversion formula

Forward

kilowatts = mechanical horsepower × 0.7457

Reverse

mechanical horsepower = kilowatts × 1.34102

Example: 10 hp × 0.7457 = 7.457 kW.

About both units

From

Mechanical Horsepower

Mechanical horsepower equals 745.7 watts — James Watt's 1782 definition based on horse labor. Used in US car engines, aircraft and some industrial equipment. US muscle cars quote hp; European cars usually kW or PS.

Real-world: Base Ford Mustang: ~310 hp. Lawn mower: 5 hp. Average car: 150–200 hp.

Read full mechanical horsepower reference →

Kilowatt

The kilowatt equals 1000 watts. Car engine outputs in metric countries are usually given in kW; 100 kW ≈ 136 PS. Home electric panels are sized in kW (typical European home: 15–25 kW peak).

Real-world: Small car: 80 kW. Performance car: 200+ kW. Home peak load: 3–10 kW. Heat pump: 5–15 kW.

Read full kilowatt reference →

Mechanical Horsepower to Kilowatt conversion table

Common mechanical horsepower to kilowatts values for quick reference.

Mechanical Horsepower (hp)	Kilowatt (kW)
1 hp	0.7457 kW
5 hp	3.7285 kW
10 hp	7.457 kW
50 hp	37.285 kW
100 hp	74.57 kW
500 hp	372.85 kW
1,000 hp	745.7 kW
5,000 hp	3,728.5 kW
10,000 hp	7,457 kW
50,000 hp	37,284.99 kW

Tips & common mistakes

Quick tips

1 hp = 745.7 W = 0.7457 kW.
US car ads quote hp; European ads quote kW or PS.
Metric horsepower (PS) differs by ~1.4% — be aware.

Avoid these

Assuming hp and PS are identical — 1.4% difference.
Using horsepower for electrical devices — watts more appropriate.
Confusing horsepower at engine flywheel vs wheel (transmission losses).

Frequently asked questions

How many kilowatts in a mechanical horsepower?

One mechanical horsepower equals 0.7457 kilowatts.

How do I convert mechanical horsepower to kilowatts?

Multiply the mechanical horsepower value by 0.7457 to get the equivalent in kilowatts.

What is 100 mechanical horsepower in kilowatts?

100 mechanical horsepower equals 74.57 kilowatts.

Is a mechanical horsepower bigger than a kilowatt?

No. 1 mechanical horsepower equals 0.7457 kilowatts, so one mechanical horsepower is smaller.

How to convert mechanical horsepower to kilowatts without a calculator?

Multiply by 0.75 for a quick estimate; use a calculator for precise results.

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