Horsepower (hp)	Milliwatts (mW)
1 hp	745699.87 mW
2 hp	1491399.74 mW
5 hp	3728499.36 mW
10 hp	7456998.72 mW
25 hp	18642496.79 mW
50 hp	37284993.58 mW
100 hp	74569987.16 mW
250 hp	186424967.9 mW
500 hp	372849935.79 mW
1000 hp	745699871.58 mW

Convert Horsepower to Milliwatts

Convert horsepower to milliwatts (hp to mW) with our instant calculator. 1 hp = 745699.871582 mW. Includes exact formula and reference tables.

How to Convert Horsepower to Milliwatts (hp to mW)

1 Horsepower (Mechanical/US) (hp) is equal to 745699.871582 Milliwatts (mW). Multiply the horsepower (mechanical/us) value by 745699.8716

Quick Answer 1 hp = 745699.871582 mW

Formula mW = hp × 745699.8716

Inverse Factor 1 mW = 0.000001 hp

Unit Definitions & Metrology Context

The SI unit of power is the watt (W), equal to 1 joule per second. 1 mechanical horsepower equals ~745.7 watts.

About Horsepower (hp): Horsepower (Mechanical/US) (hp) is a unit in the Power measurement category. It is a standard everyday unit of power measurement. Relative to the power base unit, 1 hp equals 745.699872 Watts (W).

About Milliwatts (mW): Milliwatt (mW) is a unit in the Power measurement category. It is widely used in rf transmitters, wi-fi & laser output. Relative to the power base unit, 1 mW equals 0.001 Watts (W).

Need to convert in the opposite direction? Visit our Convert Milliwatts to Horsepower (mW to hp) calculator (1 mW = 0.000001 hp).

Step-by-Step Worked Examples (hp to mW)

Convert 5 Horsepower to Milliwatts: Applying the formula (mW = hp × 745699.8716): starting with 5 hp, multiply the horsepower (mechanical/us) value by 745699.8716 to get 3728499.3579 mW.
Convert 10 Horsepower to Milliwatts: Applying the formula (mW = hp × 745699.8716): starting with 10 hp, multiply the horsepower (mechanical/us) value by 745699.8716 to get 7456998.7158 mW.
Convert 50 Horsepower to Milliwatts: Applying the formula (mW = hp × 745699.8716): starting with 50 hp, multiply the horsepower (mechanical/us) value by 745699.8716 to get 37284993.5791 mW.

Popular Power Conversions

Horsepower (Mechanical/US) ⇄ Kilowatt

1 mechanical horsepower equals approximately 0.7457 kilowatts.

Kilowatt ⇄ Horsepower (Mechanical/US)

Multiply kilowatts by ~1.34102 to calculate mechanical horsepower.

Kilowatt ⇄ Watt

1 kilowatt equals exactly 1,000 watts.

Megawatt ⇄ Kilowatt

1 megawatt equals exactly 1,000 kilowatts or 1,000,000 watts.

Frequently Asked Questions

Verified answers and formulas for converting horsepower to milliwatts.

How many milliwatts are in 1 horsepower (mechanical/us)?

There are 745699.871582 milliwatts (mW) in 1 horsepower (mechanical/us) (hp). Conversely, 1 milliwatt equals 0.000001 horsepower.

How do you convert horsepower to milliwatts?

To convert horsepower (hp) to milliwatts (mW), use the formula: mW = hp × 745699.8716. Multiply the horsepower (mechanical/us) value by 745699.8716. For example, 10 hp equals 7456998.7158 mW.

How do I convert back from milliwatts to horsepower?

To convert in the reverse direction from milliwatts (mW) to horsepower (hp), use the inverse formula: hp = mW × 0.00000134102209. Multiply the milliwatt value by 0.00000134102209 (1 mW = 0.000001 hp).

What is the difference between horsepower (mechanical/us) (hp) and milliwatt (mW)?

Both horsepower (mechanical/us) and milliwatt measure power. Horsepower (Mechanical/US) (hp) is a unit in the Power measurement category. It is a standard everyday unit of power measurement. Relative to the power base unit, 1 hp equals 745.699872 Watts (W). Milliwatt (mW) is a unit in the Power measurement category. It is widely used in rf transmitters, wi-fi & laser output. Relative to the power base unit, 1 mW equals 0.001 Watts (W).

How many watts are in 1 horsepower?

1 mechanical (imperial) horsepower equals approximately 745.7 watts. 1 metric horsepower (PS) equals ~735.5 watts.