Power Converters
Convert between watts, kilowatts, megawatts, and horsepower.
Power is the rate at which energy is used or transferred, measured in watts (one joule per second). One kilowatt equals 1,000 watts and one megawatt equals one million watts. Horsepower is an older unit still common for engines; one mechanical horsepower is about 745.7 watts. Power and energy are related but distinct: a 1,000 W appliance running for one hour consumes 1 kWh of energy.
Reviewed August 2026