Power
Convert power between watts, kilowatts, megawatts, horsepower and more. From household appliances and engines to industrial installations and solar panels.
Frequently asked questions
1 mechanical horsepower (hp) equals 745.7 watts. Horsepower is still the standard unit for vehicle engine output in the United States.
An average microwave has a power rating of 800–1,200 watts. The quoted wattage is the cooking power; total electricity consumption is slightly higher.
A standard solar panel produces 0.3–0.4 kW (300–400 W) peak under ideal conditions. A typical US residential system of 10 panels has a peak capacity of around 3–4 kWp.
kW (kilowatt) is a unit of power — how much energy is used per second. kWh (kilowatt-hour) is a unit of energy — the amount used when a 1 kW device runs for one hour. Your electricity bill charges you for kWh.