Milliwatt Conversion Calculator

Enter a value in milliwatts below to convert to another unit of power.

What Is a Milliwatt?

A milliwatt is a unit used to measure power.

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.

You might also be interested in our other electrical calculators.

How Much Is a Milliwatt?

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.

How to Convert Milliwatts

To convert milliwatts to another unit of power, you need to multiply the value by a conversion factor. A conversion factor is a numerical value used to change the units of a measurement without changing the value.[1]

You can find the conversion factors for milliwatts in the conversion table below.

Then, multiply the power measurement by the conversion factor to find the equivalent value in the desired unit of measurement.

milliwatts × conversion factor = result

You can also use a calculator, such as one of the converters below, for the conversion.

Milliwatt Conversion Table

Milliwatts and the equivalent power measurements
milliwatts watts microwatts kilowatts megawatts horsepower btu per hour kilocalories per hour
1 mW 0.001 W 1,000 µW 0.000001 kW 0.000000001 MW 0.000001341 hp 0.003412 Btu/h 0.00086 kcal/h
2 mW 0.002 W 2,000 µW 0.000002 kW 0.000000002 MW 0.000002682 hp 0.006824 Btu/h 0.001721 kcal/h
3 mW 0.003 W 3,000 µW 0.000003 kW 0.000000003 MW 0.0000040231 hp 0.010236 Btu/h 0.002581 kcal/h
4 mW 0.004 W 4,000 µW 0.000004 kW 0.000000004 MW 0.0000053641 hp 0.013649 Btu/h 0.003442 kcal/h
5 mW 0.005 W 5,000 µW 0.000005 kW 0.000000005 MW 0.0000067051 hp 0.017061 Btu/h 0.004302 kcal/h
6 mW 0.006 W 6,000 µW 0.000006 kW 0.000000006 MW 0.0000080461 hp 0.020473 Btu/h 0.005163 kcal/h
7 mW 0.007 W 7,000 µW 0.000007 kW 0.000000007 MW 0.0000093872 hp 0.023885 Btu/h 0.006023 kcal/h
8 mW 0.008 W 8,000 µW 0.000008 kW 0.000000008 MW 0.000010728 hp 0.027297 Btu/h 0.006883 kcal/h
9 mW 0.009 W 9,000 µW 0.000009 kW 0.000000009 MW 0.000012069 hp 0.030709 Btu/h 0.007744 kcal/h
10 mW 0.01 W 10,000 µW 0.00001 kW 0.00000001 MW 0.00001341 hp 0.034121 Btu/h 0.008604 kcal/h
11 mW 0.011 W 11,000 µW 0.000011 kW 0.000000011 MW 0.000014751 hp 0.037534 Btu/h 0.009465 kcal/h
12 mW 0.012 W 12,000 µW 0.000012 kW 0.000000012 MW 0.000016092 hp 0.040946 Btu/h 0.010325 kcal/h
13 mW 0.013 W 13,000 µW 0.000013 kW 0.000000013 MW 0.000017433 hp 0.044358 Btu/h 0.011185 kcal/h
14 mW 0.014 W 14,000 µW 0.000014 kW 0.000000014 MW 0.000018774 hp 0.04777 Btu/h 0.012046 kcal/h
15 mW 0.015 W 15,000 µW 0.000015 kW 0.000000015 MW 0.000020115 hp 0.051182 Btu/h 0.012906 kcal/h
16 mW 0.016 W 16,000 µW 0.000016 kW 0.000000016 MW 0.000021456 hp 0.054594 Btu/h 0.013767 kcal/h
17 mW 0.017 W 17,000 µW 0.000017 kW 0.000000017 MW 0.000022797 hp 0.058006 Btu/h 0.014627 kcal/h
18 mW 0.018 W 18,000 µW 0.000018 kW 0.000000018 MW 0.000024138 hp 0.061419 Btu/h 0.015488 kcal/h
19 mW 0.019 W 19,000 µW 0.000019 kW 0.000000019 MW 0.000025479 hp 0.064831 Btu/h 0.016348 kcal/h
20 mW 0.02 W 20,000 µW 0.00002 kW 0.00000002 MW 0.00002682 hp 0.068243 Btu/h 0.017208 kcal/h

Milliwatt Conversion Calculators

You can also convert power using one of our milliwatt converters below.

SI Units
US Customary & Imperial Units
Other Units

You might also find our other electrical calculators useful.

References

1. National Institute of Standards & Technology, Unit Conversion, https://www.nist.gov/pml/owm/metric-si/unit-conversion

Other Power Units

SI Units
US Customary & Imperial Units
Other Units