Convert Mechanical Horsepower to Milliwatts

Enter the power in mechanical horsepower below to get the value converted to milliwatts.

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1 hp(I) = 745,699.871582 mW

How to Convert Mechanical Horsepower to Milliwatts

To convert a mechanical horsepower measurement to a milliwatt measurement, multiply the power by the conversion ratio. One mechanical horsepower is equal to 745,699.871582 milliwatts, so use this simple formula to convert:

milliwatts = mechanical horsepower × 745,699.871582

The power in milliwatts is equal to the mechanical horsepower multiplied by 745,699.871582.

For example, here's how to convert 5 mechanical horsepower to milliwatts using the formula above.
5 hp(I) = (5 × 745,699.871582) = 3,728,499.357912 mW

Mechanical horsepower and milliwatts are both units used to measure power. Keep reading to learn more about each unit of measure.

Mechanical Horsepower

Mechanical horsepower is often used to measure the output of engines and motors in North America. One mechanical horsepower is equal to 745.69987158227022 watts.

The mechanical horsepower is a US customary and imperial unit of power. Mechanical horsepower can be abbreviated as hp(I), for example 1 mechanical horsepower can be written as 1 hp(I).

Try our engine horsepower calculator to calculate the power of a motor.

Milliwatts

One milliwatt is the power equal to 1/1,000 of a watt, or the energy consumption at a rate of 1/1,000 of a joule per second.

The milliwatt is a multiple of the watt, which is the SI derived unit for power. In the metric system, "milli" is the prefix for 10-3. Milliwatts can be abbreviated as mW, for example 1 milliwatt can be written as 1 mW.

Mechanical Horsepower Measurements and Equivalent Milliwatt Conversions

Common mechanical horsepower values converted to the equivalent milliwatt value
Mechanical Horsepower Milliwatts
1 hp(I) 745,700 mW
2 hp(I) 1,491,400 mW
3 hp(I) 2,237,100 mW
4 hp(I) 2,982,799 mW
5 hp(I) 3,728,499 mW
6 hp(I) 4,474,199 mW
7 hp(I) 5,219,899 mW
8 hp(I) 5,965,599 mW
9 hp(I) 6,711,299 mW
10 hp(I) 7,456,999 mW
11 hp(I) 8,202,699 mW
12 hp(I) 8,948,398 mW
13 hp(I) 9,694,098 mW
14 hp(I) 10,439,798 mW
15 hp(I) 11,185,498 mW
16 hp(I) 11,931,198 mW
17 hp(I) 12,676,898 mW
18 hp(I) 13,422,598 mW
19 hp(I) 14,168,298 mW
20 hp(I) 14,913,997 mW
21 hp(I) 15,659,697 mW
22 hp(I) 16,405,397 mW
23 hp(I) 17,151,097 mW
24 hp(I) 17,896,797 mW
25 hp(I) 18,642,497 mW
26 hp(I) 19,388,197 mW
27 hp(I) 20,133,897 mW
28 hp(I) 20,879,596 mW
29 hp(I) 21,625,296 mW
30 hp(I) 22,370,996 mW
31 hp(I) 23,116,696 mW
32 hp(I) 23,862,396 mW
33 hp(I) 24,608,096 mW
34 hp(I) 25,353,796 mW
35 hp(I) 26,099,496 mW
36 hp(I) 26,845,195 mW
37 hp(I) 27,590,895 mW
38 hp(I) 28,336,595 mW
39 hp(I) 29,082,295 mW
40 hp(I) 29,827,995 mW

More Mechanical Horsepower Power Conversions

SI Units
Convert to Watts
1 hp(I) is equal to 745.699872 watts
Convert to Microwatts
1 hp(I) is equal to 745,699,871.6 microwatts
Convert to Kilowatts
1 hp(I) is equal to 0.7457 kilowatts
Convert to Megawatts
1 hp(I) is equal to 0.000746 megawatts
US Customary & Imperial Units
Convert to Electric Horsepower
1 hp(I) is equal to 0.999598 electric horsepower
Convert to Btu Per Hour
1 hp(I) is equal to 2,544.43 btu per hour
Other Units
Convert to Kilocalories Per Hour
1 hp(I) is equal to 641.615691 kilocalories per hour