Kilowatts to Milliwatts Converter
Enter a value to instantly convert between power units.
1 Kilowatt = 1000000 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 = kW × 1,000,000Power electronics engineers sometimes need to compare a system-level kilowatt rating to component-level milliwatt dissipation limits. For example, when checking that a 0.001 kW (1 W) signal path doesn't exceed the 500 mW rated output of a particular op-amp or RF module. Converting between kW and mW spans six orders of magnitude — it's unusual in practice but useful for sanity-checking across radically different scales.
Source: NIST SP 811, Table B.8
Last reviewed: · see our methodology
Frequently Asked Questions
Real-World Examples
A 0.001 kW (1 W) USB power output = 1,000 mW — the maximum output of many low-power RF transmitters.
0.001 kW = 1000 mW
A 0.0005 kW audio amplifier output = 500 mW — a standard rating for small single-supply op-amps at full output.
0.0005 kW = 500 mW
A 0.01 kW LED driver = 10,000 mW, powering a cluster of ten 1,000 mW high-power LEDs for signage.
0.01 kW = 10000 mW
A 1 kW laboratory power supply = 1,000,000 mW — illustrating the massive span between system and component power scales.
1 kW = 1000000 mW