🔌 Power converter
Convert between watts, kilowatts, horsepower and BTU per hour. Enter a value and pick its unit to see it in every other unit.
Popular power conversions
| Conversion | Rate |
|---|---|
| Kilowatts to horsepower | 1 kW = 1.3410221 hp |
| Horsepower to kilowatts | 1 hp = 0.74569987 kW |
| Watts to horsepower | 1 W = 0.0013410221 hp |
| Horsepower to watts | 1 hp = 745.69987 W |
| Watts to kilowatts | 1 W = 0.001 kW |
| BTU Per Hour to watts | 1 BTU/h = 0.29307107 W |
| Metric Horsepower to horsepower | 1 PS = 0.98632007 hp |
Quick answers
- 100 kW to hp
- 200 kW to hp
- 300 kW to hp
- 400 kW to hp
- 500 kW to hp
- 600 kW to hp
- 100 hp to kW
- 200 hp to kW
- 300 hp to kW
- 400 hp to kW
- 500 hp to kW
- 600 hp to kW
About power units
Power is energy per unit of time; one watt is one joule per second. Car engines are rated in horsepower in the US and in kilowatts or metric horsepower (PS) in Europe.
Mechanical horsepower is 745.7 W and metric horsepower is 735.5 W, so a 100 PS engine is about 98.6 hp.
Power units
| Unit | Symbol | In watts |
|---|---|---|
| Watt | W | 1 W |
| Kilowatt | kW | 1,000 W |
| Megawatt | MW | 1,000,000 W |
| Horsepower | hp | 745.6998716 W |
| Metric Horsepower | PS | 735.49875 W |
| BTU Per Hour | BTU/h | 0.2930710702 W |
| Ton Of Refrigeration | TR | 3,516.852842 W |
All power conversions
From watts
From kilowatts
From megawatts
From horsepower
From metric horsepower
From BTU per hour
From tons of refrigeration
Power unit definitions
- Watt (W)
- The watt is the SI unit of power, one joule per second.
- Kilowatt (kW)
- A kilowatt is 1,000 watts. Car engines in Europe and electric motors are rated in kW.
- Megawatt (MW)
- A megawatt is 1,000,000 watts. Power plants and wind turbines are rated in megawatts.
- Horsepower (hp)
- Mechanical (imperial) horsepower is 550 foot-pounds per second, about 745.7 watts. US car engines are rated in it.
- Metric Horsepower (PS)
- Metric horsepower (PS) is 735.49875 watts, about 1.4% less than mechanical horsepower. European car brochures often use PS.
- BTU Per Hour (BTU/h)
- BTU per hour measures heating and cooling capacity. Air conditioners and furnaces in the US are rated in BTU/h.
- Ton Of Refrigeration (TR)
- A ton of refrigeration is 12,000 BTU per hour, the cooling from melting one short ton of ice in a day.