Kilowatt to Milliwatt Converter
Convert Kilowatt (kW) to Milliwatt (mW) instantly. 1 kW = 1,000,000 mW.
Power Converter
22 units available
1 kW = 1,000,000 mW
Formula:
mW = kW × 1,000,000With your value: 1 kW = 1,000,000 mW
How big is that?
Everyday references on a logarithmic scale, all expressed in kilowatt so you can sanity-check the result.
Other Kilowatt to Milliwatt conversions
Kilowatt to Milliwatt Conversion Table
| Kilowatt (kW) | Milliwatt (mW) |
|---|---|
| 0.5 | 500,000 |
| 1 | 1,000,000 |
| 2 | 2,000,000 |
| 5 | 5,000,000 |
| 10 | 10,000,000 |
| 15 | 15,000,000 |
| 20 | 20,000,000 |
| 25 | 25,000,000 |
| 50 | 50,000,000 |
| 100 | 100,000,000 |
| 250 | 250,000,000 |
| 500 | 500,000,000 |
| 1000 | 1,000,000,000 |
Milliwatt to Kilowatt Conversion Table
| Milliwatt (mW) | Kilowatt (kW) |
|---|---|
| 0.5 | 5.000000e-7 |
| 1 | 1.000000e-6 |
| 2 | 2.000000e-6 |
| 5 | 5.000000e-6 |
| 10 | 1.000000e-5 |
| 15 | 1.500000e-5 |
| 20 | 2.000000e-5 |
| 25 | 2.500000e-5 |
| 50 | 5.000000e-5 |
| 100 | 0.0001 |
| 250 | 0.00025 |
| 500 | 0.0005 |
| 1000 | 0.001 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Kilowatt (kW)
Power
Derived from the watt (1 W = 1 J/s).
Source: NIST Special Publication 811, Guide for the Use of the International System of Units
National Institute of Standards and Technology (US) · Reviewed 2026-07-01
Milliwatt (mW)
Power
Derived from the watt (1 W = 1 J/s).
Source: NIST Special Publication 811, Guide for the Use of the International System of Units
National Institute of Standards and Technology (US) · Reviewed 2026-07-01
How to Convert Kilowatt to Milliwatt
To convert from Kilowatt (kW) to Milliwatt (mW), multiply the value by 1,000,000.
Formula: mW = kW × 1,000,000
Reverse: kW = mW × 0.000001
Step-by-Step Example
- Start with your value in Kilowatt. For example: 5 kW
- Multiply by the conversion factor: 5 x 1,000,000
- The result is: 5,000,000 mW
About Kilowatt
The kilowatt (kW) is a unit of power. One kilowatt equals 1000 watts. UnitConvertLab converts it against every other power unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.
Common uses: power calculations, engineering and science, education.
About Milliwatt
The milliwatt (mW) is a unit of power. One milliwatt equals 0.001 watts. UnitConvertLab converts it against every other power unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.
Common uses: power calculations, engineering and science, education.
Frequently Asked Questions
How many Milliwatt are in 1 Kilowatt?
There are exactly 1,000,000 Milliwatt in 1 Kilowatt. This means the conversion factor from Kilowatt to Milliwatt is 1,000,000.
What is the formula to convert Kilowatt to Milliwatt?
The formula to convert Kilowatt to Milliwatt is: mW = kW × 1,000,000. For example, to convert 10 Kilowatt to Milliwatt, you would multiply 10 by 1,000,000.
What is a Kilowatt?
The kilowatt (kW) is a unit of power. One kilowatt equals 1000 watts. UnitConvertLab converts it against every other power unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.
What is a Milliwatt?
The milliwatt (mW) is a unit of power. One milliwatt equals 0.001 watts. UnitConvertLab converts it against every other power unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.
What are the common uses of Kilowatt?
The Kilowatt is commonly used in power calculations, engineering and science, education.
Related Power Conversions
Cite this page
UnitConvertLab. (2026). Kilowatt to Milliwatt converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/kilowatt-to-milliwatt