How to convert Horsepower to Watts

To convert horsepower to a watt measurement, use among the recipe below.

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Mechanical horsepower to Watts

Formula to transform mechanical horsepower to watts:

due to the fact that one mechanically horsepower is equal to 745.699872 watts, the formula to uncover watts is to multiply mechanical horsepower through 745.699872.

since one electrical horsepower is same to 746 watts, the formula to discover watts is to multiply electric horsepower through 746.

since one metric speech is same to 735.49875 watts, the formula to discover watts is to main point metric horsepower by 735.49875.

because one boiler horsepower is same to 9,809.5 watts, the formula to find watts is to main point boiler speech by 9,809.5.

Horsepower and watts space both units supplied to measure up power. Keep reading to learn much more about every unit of measure.


The term horsepower was embraced by Scottish inventor James Watt to measure the power output that his vapor engine and to compare the power v that of equines horses.<1> speech were later on used to measure the power output the piston and also turbine engines and electrical motors.

over there are currently several different types of horsepower, consisting of mechanical, electrical, metric, boiler, brake, and indicated, and they every have different applications in industry. Mechanical and electric space the most commonly used types.

Mechanical Horsepower

mechanical horsepower is regularly used to measure the calculation of engines and also motors in north America. One mechanically horsepower is equal to 745.69987158227022 watts.

The mechanical horsepower is a us customary and imperial unit that power. Mechanical horsepower deserve to be abbreviated as hp(I); because that example, 1 mechanically horsepower can be created as 1 hp(I).

Electric Horsepower

electrical horsepower is provided to measure up the output of electric motors and other electric machines in the US. One electric horsepower is same to specifically 746 watts.

The electrical horsepower is a us customary and also imperial unit the power. Electric horsepower have the right to be abbreviated as hp(E); for example, 1 electrical horsepower have the right to be composed as 1 hp(E).

Metric Horsepower

One metric speech is the power required to one metric horsepower together the lift a 75 kilogram mass in ~ at one meter every second.<2> One metric horsepower is same to 735.49875 watts.

The metric speech is a non-SI metric unit because that power. Metric horsepower can be abbreviated together hp(M), and are also sometimes abbreviated as PS, cv, hk, pk, ks, or ch. Because that example, 1 metric horsepower have the right to be created as 1 hp(M), 1 PS, 1 cv, 1 hk, 1 pk, 1 ks, or 1 ch.

Boiler Horsepower

Boiler speech is supplied to measure the strength of a boiler to generate steam. One boiler speech is same to the power necessary to evaporate 34.5 pounds in one hour.<3>

Boiler horsepower can be abbreviated together hp(S); because that example, 1 boiler horsepower have the right to be written as 1 hp(S).

try our engine speech calculator to calculate the strength of a motor.


One watt is the strength equal to the price of energy of one joule per 2nd in an electric circuit.<4> One watt is additionally equal come the power developed in a circuit v a voltage potential of one volt through a present of one amp.

The watt is the SI derived unit for power in the metric system. Watts have the right to be abbreviated as W; for example, 1 watt have the right to be composed as 1 W.

Watt"s law states the relationship in between power, current, and voltage. Using Watt"s Law, it"s feasible to express the strength in watt as an expression making use of current and voltage.

PW = IA × VV

The power in watts is equal to the current in amperes times the potential difference in volts.

See more: How Many Seconds In 23 Hours ), Convert 23 Hours To Seconds

combining this v Ohm"s Law, it"s also possible to refer the strength in watts making use of resistance in enhancement to volts and amps.

Horsepower to Watt conversion Table

watt converted to assorted horsepower values. watt Mechanical Horsepower electric Horsepower Metric speech 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


Encyclopædia Britannica, Horsepower,, metric horsepower,, Horsepower, bureau of Weights and Measures, The worldwide System of Units, nine Edition, 2019,