Power Converter
Convert between watts, kilowatts, horsepower (mechanical, metric and electrical), BTU per hour and tons of refrigeration.
Several different horsepower units exist. This site lists mechanical (745.7 W), metric (735.5 W) and electrical (746 W) horsepower separately.
Popular power conversions
- Horsepower to kilowatts
- Kilowatts to horsepower
- Horsepower to watts
- Watts to BTU per hour
- BTU per hour to watts
- Metric horsepower to kilowatts
- Kilowatts to metric horsepower
- Horsepower to metric horsepower
- Tons of refrigeration to kilowatts
- Megawatts to kilowatts
Common units
| Unit | Symbol | Value in watts |
|---|---|---|
| watt | W | 1 W |
| kilowatt | kW | 1,000 W |
| megawatt | MW | 1,000,000 W |
| gigawatt | GW | 1,000,000,000 W |
| horsepower | hp | 745.6998716 W |
| metric horsepower | PS | 735.49875 W |
| BTU per hour | BTU/h | 0.2930710702 W |
Other units
| Unit | Symbol | Value in watts |
|---|---|---|
| milliwatt | mW | 0.001 W |
| electrical horsepower | hp (E) | 746 W |
| foot-pound per second | ft⋅lbf/s | 1.355817948 W |
Historical and traditional units
| Unit | Symbol | Value in watts |
|---|---|---|
| ton of refrigeration | TR | 3,516.852842 W |
| kilocalorie per hour | kcal/h | 1.162222222 W |
| calorie per second | cal/s | 4.184 W |
| erg per second | erg/s | 1×10⁻⁷ W |
| poncelet | poncelet | 980.665 W |