Watts to Milliwatts Converter
Enter a value to instantly convert between power units.
Precision4 dp
1 Watt = 1000 Milliwatt
Key Formulas
Kilowatt → Horsepower (mech)
hp = kW × 1.34102Horsepower (mech) → Kilowatt
kW = hp × 0.7457Watt → Kilowatt
kW = W × 0.001Kilowatt → Watt
W = kW × 1000Formula
mW = W × 1000A watt is 1000 milliwatts — this comes from the metric prefix 'milli' meaning one-thousandth. The conversion is simple: multiply by 1000. This appears in electronics (small circuits), LED specifications, and battery-powered devices.
Source: NIST SP 811
Frequently Asked Questions
Real-World Examples
1 watt equals 1000 milliwatts.
1 W = 1000 mW
Half a watt equals 500 mW.
0.5 W = 500 mW
5 watts equals 5000 mW.
5 W = 5000 mW
0.1 watt equals 100 mW.
0.1 W = 100 mW