Watts to Horsepower Conversion

This calculator allows you to quickly and easily convert watts (W) to four different types of horsepower: mechanical, electrical, metric, and boiler. Simply enter the watts value and click the “Convert” button to see the equivalent horsepower values. Use the “Reset” button to clear the form and start a new conversion.

Watts to Horsepower Conversion Calculator

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Horsepower to watts conversion ►

How to Convert Watts to Horsepower?

Watts to Mechanic / Hydraulic Horsepower

A single unit of mechanical or hydraulic horsepower is equivalent to 745.699872 watts:

1 hp(I) = 745.699872 W

Therefore, the conversion formula from watts to horsepower is as follows:

P_(hp) = P_(W) / 745.699872

Example.

Convert 250 W to mechanic horsepower:

P_(hp) = 250 W / 745.699872 = 0.335255522 hp

Watts to Electrical Horsepower

To determine the electric horsepower (hp(E)) equivalent of a given power in watts, the following formula can be applied:

P_hp(E) = P_(W) / 746

Considering that electric horsepower is equal to 746 watts, the conversion formula involves dividing the power in watts by 746.

Example.

Let’s say we have a device that consumes 1500 watts of power. To convert this to electrical horsepower, we can use the conversion factor that 1 electrical horsepower is equal to 746 watts.

P_hp(E) = P_(W) / 746 = 1500 / 746 = 2.01072386 electrical horsepower

Watts to Metric Horsepower

To convert watts to metric horsepower, use the following formula:

P_hp(M) = P_(W) / 735.49875

Metric horsepower is obtained by dividing the power in watts by 735.49875.

Example.

Convert 250 W to metric horsepower:

P_(hp) = 250 W / 735.49875 = 0.3399054 hp

Watts to Boiler Horsepower

To convert watts to boiler horsepower, use the following formula:

P_hp(S) = P_(W) / 9809.5

Since 1 boiler horsepower is equivalent to 9809.5 watts, the formula calculates the boiler horsepower by dividing the power in watts by 9809.5.

Example.

For example, here’s how to convert 2500 watts to boiler horsepower.

P_hp(S) = (2500 / 9809.5) = 0.25485498 hp(S)

Watts to Horsepower Conversion Table

Watts	Mechanical Horsepower	Electric Horsepower	Metric Horsepower	Boiler Horsepower
1 W	0.001341	0.00134	0.00136	0.000102
2 W	0.002682	0.002681	0.002719	0.000204
3 W	0.004023	0.004021	0.004079	0.000306
4 W	0.005364	0.005362	0.005438	0.000408
5 W	0.006705	0.006702	0.006798	0.00051
6 W	0.008046	0.008043	0.008158	0.000612
7 W	0.009387	0.009383	0.009517	0.000714
8 W	0.010728	0.010724	0.010877	0.000816
9 W	0.012069	0.012064	0.012237	0.000917
10 W	0.01341	0.013405	0.013596	0.001019
20 W	0.02682	0.02681	0.027192	0.002039
30 W	0.040231	0.040214	0.040789	0.003058
40 W	0.053641	0.053619	0.054385	0.004078
50 W	0.067051	0.067024	0.067981	0.005097
60 W	0.080461	0.080429	0.081577	0.006117
70 W	0.093872	0.093834	0.095174	0.007136
80 W	0.107282	0.107239	0.10877	0.008155
90 W	0.120692	0.120643	0.122366	0.009175
100 W	0.134102	0.134048	0.135962	0.010194
200 W	0.268204	0.268097	0.271924	0.020388
300 W	0.402307	0.402145	0.407886	0.030583
400 W	0.536409	0.536193	0.543849	0.040777
500 W	0.670511	0.670241	0.679811	0.050971
600 W	0.804613	0.80429	0.815773	0.061165
700 W	0.938715	0.938338	0.951735	0.071359
800 W	1.0728	1.0724	1.0877	0.081554
900 W	1.2069	1.2064	1.2237	0.091748
1000 W	1.341	1.3405	1.3596	0.101942

See Also