Power Converter
Convert watts, kilowatts, megawatts, horsepower, and BTU per hour. Free power converter for engines, electronics, and HVAC calculations.
Last updated: September 2026
8 significant digits
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1 mW = 0.001 W
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Common power units
Convert rates of energy use for electrical and mechanical systems. Use OmniUnit for fast conversions between common units without leaving the page.
- Milliwatt (mW)
- Watt (W)
- Kilowatt (kW)
- Megawatt (MW)
- Gigawatt (GW)
- Mechanical horsepower (hp)
- Metric horsepower (PS)
- Electrical horsepower (hp(E))
- BTU per hour (BTU/h)
- Foot-pound per second (ft⋅lb/s)
- Ton of refrigeration (TR)