Mechanical horsepower to Milliwatt Converter (and vice versa)

Created by: tinycalcs.com/en
Number of supported units: 2
Last update: 2026

This converter allows you to convert mechanical horsepower [hp(I)] to milliwatts [mW] or milliwatts [mW] to mechanical horsepower [hp(I)]. Calculations are performed in both directions. The calculation result and the entered value are displayed with up to 20 decimal places for maximum accuracy.

1 mechanical horsepower [hp(I)] ≈ 745,699.8716 milliwatts [mW]1 milliwatt [mW] ≈ 1.341 * 10-6 mechanical horsepower [hp(I)]

Convert mechanical horsepower to milliwatts

There are two simple ways to convert mechanical horsepower [hp(I)] to milliwatts [mW]. In the first calculation method, the value in mechanical horsepower [hp(I)] is divided by the rounded conversion factor of 1.341 * 10-6. The second method multiplies the value in mechanical horsepower [hp(I)] by the rounded conversion factor of 745,699.8716.

  • Milliwatts [mW] ≈ mechanical horsepower [hp(I)] ÷ (1.341 * 10-6)
  • Milliwatts [mW] ≈ mechanical horsepower [hp(I)] * 745,699.8716

However, rounded conversion values are only suitable for rough conversions, as rounding errors can occur in the calculation result. The most accurate conversion of mechanical horsepower [hp(I)] to milliwatts [mW] can be achieved using the following calculation method.

  • Milliwatts [mW] = mechanical horsepower [hp(I)] * 272.155422 * 2,739.97801

Convert milliwatts to mechanical horsepower

Converting milliwatts [mW] to mechanical horsepower [hp(I)] is easy and can be done in two ways. The first method involves multiplication, in which the value in milliwatts [mW] is multiplied by the rounded conversion factor of 1.341 * 10-6. The second variant is a division. Here, the value in milliwatts [mW] is divided by the rounded conversion factor of 745,699.8716.

  • Mechanical horsepower [hp(I)] ≈ milliwatts [mW] * 1.341 * 10-6
  • Mechanical horsepower [hp(I)] ≈ milliwatts [mW] ÷ 745,699.8716

However, rounded conversion values do not allow for exact calculations because rounding errors can occur in the calculation result. The most accurate conversion of milliwatts [mW] to mechanical horsepower [hp(I)] can be achieved using the following calculation method.

  • Mechanical horsepower [hp(I)] = milliwatts [mW] ÷ 272.155422 ÷ 2,739.97801

Converter

Decimal places

How it's calculated

Factor: 
≈ 745,699.872
Milliwatts = Mechanical horsepower * 272.155422 * 2,739.97801
Mechanical horsepower = Milliwatts ÷ 272.155422 ÷ 2,739.97801

To all available units

Mechanical horsepower

Nanowatts

Mechanical horsepower

Terawatts

Megawatts

Centiwatts

Megawatts

Decawatts

Megawatts

Deciwatts

Popular with other users …

Pressure

Hectopascals, millibars, and bars are just a few examples of the many units of pressure. The pressure converter makes conversion a breeze and ensures that the results are accurate and precise.

Pressure converter

Resistance

Electrical resistance is often expressed in ohms or kiloohms. However, it is also possible to use statohms or deciohms. The resistance converter is ideal for converting between different units of resistance.

Resistance converter

Speed

While mph is used in the USA, km/h is the standard in Europe, and seafaring and aviation rely on knots. This speed converter is the perfect tool for accurately converting between various units of speed.

Speed converter

Temperature

Whether you want to convert °Ra to °C, degrees Fahrenheit to Kelvin, or °De to degrees Celsius, the temperature converter can accurately convert all common temperature units.

Temperature converter