Horsepower to Milliwatts Converter
Enter the power in horsepower below to get the value converted to milliwatts.
Do you want to convert milliwatts to horsepower?
How to Convert Horsepower to Milliwatts
To convert horsepower to a milliwatt measurement, use one of the formulas below.
Mechanical Horsepower to Milliwatts
Formula to convert mechanical horsepower to milliwatts:
milliwatts = hp(I) × 745,699.871582
Since one mechanical horsepower is equal to 745,699.871582 milliwatts, the formula to find milliwatts is to multiply mechanical horsepower by 745,699.871582.
Electric Horsepower to Milliwatts
Formula to convert electric horsepower to milliwatts:
milliwatts = hp(E) × 746,000
Since one electric horsepower is equal to 746,000 milliwatts, the formula to find milliwatts is to multiply electric horsepower by 746,000.
Metric Horsepower to Milliwatts
Formula to convert metric horsepower to milliwatts:
milliwatts = hp(M) × 735,498.75
Since one metric horsepower is equal to 735,498.75 milliwatts, the formula to find milliwatts is to multiply metric horsepower by 735,498.75.
Boiler Horsepower to Milliwatts
Formula to convert boiler horsepower to milliwatts:
milliwatts = hp(S) × 9,809,500
Since one boiler horsepower is equal to 9,809,500 milliwatts, the formula to find milliwatts is to multiply boiler horsepower by 9,809,500.
How Many Milliwatts Are in a Horsepower?
There are 745,699.871582 milliwatts in a horsepower, which is why we use this value in the formula above.
1 hp = 745,699.871582 mW
Horsepower and milliwatts are both units used to measure power. Keep reading to learn more about each unit of measure.
There are several types of horsepower, including mechanical, electrical, metric, boiler, brake, and indicated, and they all have different applications in industry. Mechanical and electrical are the most commonly used.
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).
Electric horsepower is used to measure the output of electric motors and other electrical machines in the US. One electric horsepower is equal to exactly 746 watts.
The electric horsepower is a US customary and imperial unit of power. Electric horsepower can be abbreviated as hp(E); for example, 1 electric horsepower can be written as 1 hp(E).
The metric horsepower is a non-SI metric unit for power. Metric horsepower can be abbreviated as hp(M), and are also sometimes abbreviated as PS, cv, hk, pk, ks, or ch. For example, 1 metric horsepower can be written as 1 hp(M), 1 PS, 1 cv, 1 hk, 1 pk, 1 ks, or 1 ch.
Boiler horsepower can be abbreviated as hp(S); for example, 1 boiler horsepower can be written as 1 hp(S).
The term horsepower was adopted by Scottish inventor James Watt to measure the power output of his steam engine and to compare that power with that of horses horses. Horsepower were later used to measure the power output of piston and turbine engines and electrical motors.
Try our engine horsepower calculator to calculate the power of a motor.
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 thousandths, or 10-3. Milliwatts can be abbreviated as mW; for example, 1 milliwatt can be written as 1 mW.
Horsepower to Milliwatt Conversion Table
|Milliwatts||Mechanical Horsepower||Electric Horsepower||Metric Horsepower||Boiler Horsepower|
- Merriam-Webster, metric horsepower, https://www.merriam-webster.com/dictionary/metric%20horsepower
- Wikipedia, Horsepower, https://en.wikipedia.org/wiki/Horsepower
- Encyclopædia Britannica, Horsepower, https://www.britannica.com/science/horsepower