hp to kw | Exact Decimal + Formula

1 Horsepower (HP) = 0.7457 Kilowatt

Horsepower to kilowatts conversions are widely used in the automotive and electrical industries to describe engine outputs and generator capacities.

About Horsepower (HP) and Kilowatt

Horsepower (HP) (hp)

One horsepower is about 745.7 watts, originally defined as the work a strong horse can sustain.

Where it's used: Car engines, electric motors, and HVAC equipment ratings.

Kilowatt (kW)

A kilowatt is 1,000 watts.

Where it's used: Home electrical capacity, EV charging rates, and generator ratings.

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Precision

Formula

kW = hp × 0.745699872

To convert Horsepower (HP) to Kilowatt, use the formula displayed above.

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Horsepower (HP) to Kilowatt: Quick Reference Table

Horsepower (HP)	Kilowatt (Decimal)	Fraction	Real-world equivalent
0.001 hp	0.000746 kW	-	fractional unit measurement
0.01 hp	0.007457 kW	-	fractional unit measurement
0.1 hp	0.07457 kW	-	fractional unit measurement
0.5 hp	0.37285 kW	-	fractional unit measurement
1 hp	0.7457 kW	-	fractional unit measurement
2 hp	1.4914 kW	-	standard single unit scale
5 hp	3.728499 kW	-	standard single unit scale
10 hp	7.456999 kW	-	standard single unit scale
25 hp	18.642497 kW	-	multiple unit increments
50 hp	37.284994 kW	-	multiple unit increments
100 hp	74.569987 kW	-	multiple unit increments
250 hp	186.424968 kW	-	multiple unit increments
500 hp	372.849936 kW	-	multiple unit increments
1000 hp	745.699872 kW	-	multiple unit increments

hp to kW Formula and Examples

Direct Formula kW = hp × 0.745699872

Inverse Formula hp = kW × 1.341022

Mental Math Shortcut

Divide the value by roughly 1.3 to quickly estimate the converted result.

Common Horsepower (HP) to Kilowatt Calculations

5 hp = 3.728499 kW
10 hp = 7.456999 kW
50 hp = 37.284994 kW
100 hp = 74.569987 kW
500 hp = 372.849936 kW

Precision & Practical Use

For example, 10 hp = 7.456999 kW — roughly standard single unit scale.

Appliance and engine ratings are typically whole watts, kilowatts, or horsepower. One decimal is plenty for comparisons.

How to Convert Horsepower (HP) to Kilowatt

How many kilowatts are in one horsepower (hp)?

One Horsepower (HP) (hp) equals 0.7457 Kilowatt (kW). To convert horsepower (hp)s to kilowatts, multiply the horsepower (hp) value by 0.7457.

How do I convert Horsepower (HP) to Kilowatt?

Multiply your horsepower (hp) value by 0.7457 to get the result in Kilowatt: kW = hp × 0.7457. For example, 5 hp = 3.728499 kW.

What is the formula for converting hp to kW?

The conversion formula is kW = hp × 0.7457. Use the calculator above for any value, and see the reference table below for common inputs from 0.001 to 1000.

Is there a quick mental estimate for hp to kW?