Power Converter
Convert between watts, kilowatts, horsepower, BTU/h, and other power units.
- Free forever
- Instant results
- Private — runs in your browser
1 Mechanical Horsepower (hp) =
745.6998716
Watts (W)
1 Mechanical Horsepower (hp) in every unit
- Watts (W)
- 745.6998716
- Kilowatts (kW)
- 0.7456998716
- Megawatts (MW)
- 0.0007456998716
- Mechanical Horsepower (hp)
- 1
- Electrical Horsepower (hp(E))
- 0.9995976831
- Metric Horsepower (PS)
- 1.013869665
- BTU per Hour (BTU/h)
- 2,544.433578
- Tons of Refrigeration (TR)
- 0.2120361315
Power References
1 horsepower = 745.7 watts
1 kilowatt = 1,000 watts
100 watts = 0.134 horsepower
1 megawatt = 1,341 horsepower
Common Power Ratings
LED light bulb: 8-12 watts
Microwave oven: 1,000-1,200 watts
Car engine: 100-500 horsepower
Electric motor: 0.5-10 kilowatts
How to use the Power
Enter a power value, select the current unit (watts, kilowatts, horsepower, BTU/h, etc.), choose your target unit, and get instant conversion. Used in engineering, HVAC, and motor specifications.
Formula
All power values convert through watts (base SI unit). value_in_w = input × from_factor; result = value_in_w ÷ to_factor.
History & interesting facts
Did you know?
Horsepower was created by James Watt to compare steam engines to horses. 1 hp is roughly the power of 1 horse pulling, but varies by standard.
Origin & history
The watt is the SI unit of power. Named after James Watt, the steam engine innovator. 1 watt = 1 joule per second.
Fascinating facts
- 1
1 horsepower = 745.7 watts
- 2
1 kilowatt = 1,000 watts
- 3
1 megawatt = 1 million watts
- 4
Metric horsepower (ps) = 735.5 watts (DIN standard)
- 5
Typical home uses 1-2 kilowatts continuously
- 6
Car engines: 50-500 horsepower typical
Frequently asked questions
What is a watt?
A watt is the SI unit of power. 1 watt = 1 joule per second. It measures the rate of energy transfer.
How many watts is 1 horsepower?
1 horsepower = 745.7 watts. This varies slightly by standard (imperial vs metric horsepower).
How much power does a typical home use?
A typical home uses 1-3 kilowatts continuously, with peak demand during heating/cooling seasons around 5-10 kW.