kilowatt to milliwatt
Convert kilowatt (kW) to milliwatt (mW). Use an editable power converter, conversion formula, and reference table.
1 kW = 1,000,000 mW
Conversion formula
One kilowatt equals 1,000,000 milliwatt. Multiply your value in kilowatt by this factor to get milliwatt. For the reverse conversion, divide by the same factor.
Worked example
To convert 5 kilowatt:5 × 1,000,000 = 5,000,000 mW
Conversion table
| kilowatt (kW) | milliwatt (mW) |
|---|---|
| 0.01 | 10,000 |
| 0.1 | 100,000 |
| 1 | 1,000,000 |
| 2 | 2,000,000 |
| 5 | 5,000,000 |
| 10 | 10,000,000 |
| 25 | 25,000,000 |
| 50 | 50,000,000 |
| 100 | 100,000,000 |
| 1000 | 1,000,000,000 |
About these measurements
Power is the rate of energy transfer.
The base reference used here is the watt. One kilowatt is 1,000 base units; one milliwatt is 0.001 base units.
Important distinctions
Mechanical horsepower and metric horsepower are distinct units.
Precision
The converter uses stored conversion factors and floating-point arithmetic. Results display up to ten significant digits, switching to scientific notation for very small or large values. Keep the precision of your original measurement when reporting results.
Common questions
How do I convert kW to mW?
Multiply the quantity in kW by 1,000,000. You can also type the value into the converter above.
Can I reverse the conversion?
Yes. Use the swap button or open the milliwatt to kilowatt converter.
Reference
NIST Guide to the SI — conversion factors and prefix conventions. SI prefixes scale units by powers of ten; the dimension-specific notes above describe the assumptions used on this page.
