ENERGY
Power
Rate of work, heat transfer and machinery output.
Try a decimal, 1e-9, 1/3, or 5 1/2.
Result1000 mW1 W = 1000 mW
EVERYDAY · ENGINEERING · SCIENCE
W to mW Converter
Convert watt (W) to milliwatt (mW). Enter a value for an instant result, or use the examples and reverse conversion below.
520units ready to convert
HOW IT IS CALCULATED
Convert through watt
Enter a watt value to calculate milliwatt with full internal precision before display rounding.
Display PrecisionAuto · 6 significant digits
Auto trims unnecessary zeroes and uses scientific notation for extreme magnitudes. Use Digits to set the display precision; calculations retain full precision.
QUICK REFERENCE
All units in this quantity
| Unit | Symbol | Converted value |
|---|---|---|
| milliwattfrom W | mW | 1000 |
| wattfrom W | W | 1 |
| kilowattfrom W | kW | 0.001 |
| megawattfrom W | MW | 0.000001 |
| gigawattfrom W | GW | 0.000000001 |
| mechanical horsepowerfrom W | hp | 0.00134102 |
| metric horsepowerfrom W | PS | 0.00135962 |
| electrical horsepowerfrom W | hp(E) | 0.00134048 |
| boiler horsepowerfrom W | hp(S) | 0.000101942 |
| foot pound-force per secondfrom W | ft·lbf/s | 0.737562 |
| British thermal unit per hourfrom W | BtuIT/h | 3.41214 |
| ton of refrigerationfrom W | TR | 0.000284345 |
SI symbols follow international notation. U.S. and Imperial measures are labelled separately where their values differ.
W to mW Conversion Reference
Watt (W) and milliwatt (mW) are units of power. Use this page to convert in either direction.
Conversion Examples
| Watt (W) | Milliwatt (mW) |
|---|---|
| 1 W | 1000 mW |
| 5 W | 5000 mW |
| 10 W | 10000 mW |
| 100 W | 100000 mW |
Examples are rounded to 6 significant digits. The interactive converter retains full calculation precision; change Display Precision to see more digits.
Reverse Conversion
Related Power Conversions
W to kW (watt to kilowatt)W to MW (watt to megawatt)W to GW (watt to gigawatt)W to hp (watt to mechanical horsepower)W to PS (watt to metric horsepower)W to hp(E) (watt to electrical horsepower)W to hp(S) (watt to boiler horsepower)W to ft·lbf/s (watt to foot pound-force per second)W to BtuIT/h (watt to British thermal unit per hour)W to TR (watt to ton of refrigeration)