Horsepower to Watts Conversion

To use the horsepower to watts conversion calculator, first select the unit type of your horsepower input – mechanical, electrical, metric or boiler. Then, enter the value of your horsepower into the input field. Click the “Convert” button to see the equivalent value in watts. To reset the calculator, click the “Reset” button.

Horsepower to Watts Conversion Calculator

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Watts to horsepower conversion ►

How to Convert Horsepower to Watts?

Mechanic / Hydraulic Horsepower to Watts

P_(W) = 745.699872 * P_hp(I), where

P_(W) – power in watts,

P_hp(I) – power in mechanic horsepower.

Example.

Let’s say we have a hydraulic system that is capable of producing 500 horsepower. We want to convert this value to watts to better understand the system’s power output.

P_(W) = 745.699872 * P_hp(I) = 500 horsepower * 745.699872 watts/horsepower = 372849.936 watts

Electrical Horsepower to Watts

P_(W) = 746 * P_hp(E), where

P_(W) – power in watts

P_hp(E) – power in electrical horsepower.

Example.

Let’s say you have an electric motor with a power rating of 3 electrical horsepower. To convert it to watts, we can use the following calculation:

P_(W) = 746 * P_hp(E) = 3 horsepower * 746 watts/horsepower = 2238 watts.

Metric Horsepower to Watts

P_(W) = 735.49875 * P_hp(M), where

P_(W) – power in watts,

P_hp(M) – power in metric horsepower.

Example

Convert 20 metric hp to watts:

P_(W) = 735.49875 * 20 hp = 14709.97499 W

Boiler Horsepower to Watts

P_(W) = P_hp(S) * 9809.5, where

P_(W) – power in watts,

P_hp(S) – power in boiler horsepower.

Example.

Here’s how to convert 10 boiler horsepower to watts using the formula.

P_(W) = P_hp(S) * 9809.5 = (10 * 9809.5) = 98095 W.

HP to Watts Conversion Table

Watts converted to various horsepower values.

Watts, W	Mechanical Horsepower, hp(I)	Electric Horsepower, hp(E)	Metric Horsepower, hp(M)	Boiler Horsepower, hp(S)
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