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Kilowatts to Milliwatts Converter

Convert kilowatts (kW) to milliwatts (mW), with the formula, a conversion table and exact factors.

Change the values and press Calculate to work out your own figures.

Enter a power, choose its unit and the unit you want. The answer is exact until it is shown, and the same value appears in every other unit.

A number, fraction (3/8), mixed number (1 1/2), scientific notation (2.5e6) or a simple sum such as 2*3.
The unit you want the answer in. Swap exchanges the two units.
Result
1,000,000 mW
watts
1,000 W
microwatts
1,000,000,000 µW
megawatts
0.001 MW
gigawatts
1 × 10⁻⁶ GW
horsepower (mechanical, 550 ft·lbf/s)
1.3410220896 hp
metric horsepower (PS)
1.3596216173 PS
horsepower (electric)
1.34048257373 hp(E)
BTU (IT) per hour
3,412.14163313 BTU/h
kilocalories per hour
860.420650096 kcal/h

1 kW = 1,000,000 mW

Show the working
  1. 1 kW = 1000000 mW
  2. 1 × 1000000 = 1000000 mW

How to convert kilowatts to milliwatts

1 kW = 1,000,000 mW, so multiply by 1,000,000 to go from kilowatts to milliwatts. Going the other way, 1 mW = 1 × 10⁻⁶ kW.

mW = kW × 1,000,000
kW = mW × 1

Worked example:

1 kW = 1000000 mW
5 × 1000000 = 5000000 mW

Kilowatts to milliwatts table

KilowattsMilliwatts
1 kW1,000,000 mW
2 kW2,000,000 mW
3 kW3,000,000 mW
4 kW4,000,000 mW
5 kW5,000,000 mW
6 kW6,000,000 mW
7 kW7,000,000 mW
8 kW8,000,000 mW
9 kW9,000,000 mW
10 kW10,000,000 mW
15 kW15,000,000 mW
20 kW20,000,000 mW
25 kW25,000,000 mW
30 kW30,000,000 mW
40 kW40,000,000 mW
50 kW50,000,000 mW
75 kW75,000,000 mW
100 kW100,000,000 mW
250 kW250,000,000 mW
500 kW500,000,000 mW
1000 kW1,000,000,000 mW

About the units

Kilowatts (kW)
Kilowatts, a metric unit. Definition: BIPM SI Brochure (SI prefixes).
Milliwatts (mW)
Milliwatts, a metric unit. Definition: BIPM SI Brochure (SI prefixes).

Formula version 0.1.0Reviewed