Power Converter
Convert between units of power, including watts, kilowatts, horsepower and BTU per hour.
Convert watts
Convert kilowatts
Convert horsepower
Convert BTU per hour
Convert megawatts
Convert metric horsepower
Power units
- Watt (W)
- The watt is the SI unit of power, equal to one joule per second. It is used to rate electrical appliances, lighting and electronics.
- Kilowatt (kW)
- A kilowatt is 1000 watts. It is used for the output of engines, electric motors, heaters and home solar systems.
- Horsepower (hp)
- Mechanical horsepower is defined as 550 foot-pounds force per second, exactly 745.69987158227022 watts. It is used for engine and motor ratings in the United States and United Kingdom.
- BTU per hour (BTU/h)
- A BTU per hour is one British thermal unit of heat delivered or removed each hour, about 0.2931 watts. It is used in the United States to rate air conditioners, furnaces and heaters.
- Megawatt (MW)
- A megawatt is 1,000,000 watts, or 1000 kilowatts. It is used for wind turbines, locomotives, ships and small power plants.
- Metric horsepower (PS)
- Metric horsepower is defined as 75 kilogram-force meters per second, exactly 735.49875 watts. It is used for car engine ratings in continental Europe and Asia under names such as PS, CV and ch.
- Gigawatt (GW)
- A gigawatt is 1,000,000,000 watts, or 1000 megawatts. It is used for the output of large power plants and national electricity grids.
- Ton of refrigeration (TR)
- A ton of refrigeration is a cooling rate of 12,000 BTU per hour, about 3517 watts. It is used in North America to size air conditioning and refrigeration equipment.