Power Converter
Power is the rate at which energy is used or produced. The SI unit is the watt. Motors and engines are often rated in horsepower, while appliances and solar systems use watts and kilowatts. Mechanical and metric horsepower differ slightly.
1 W = 0.001 kW
About power conversion
Power conversion is commonly needed when engines, appliances, solar panels, and HVAC sizing.
Popular conversions
All power units
| Unit | Symbol | System |
|---|---|---|
| Watt | W | SI |
| Kilowatt | kW | SI |
| Megawatt | MW | SI |
| Milliwatt | mW | SI |
| Horsepower (mechanical) | hp | Imperial |
| Horsepower (metric) | PS | Metric |
| BTU per Hour | BTU/h | Imperial |
| Foot-pound per Second | ft·lb/s | Imperial |
Frequently asked questions
What is the base unit for power?
Power conversions on this site are calculated against the watt (W).
Which power units can I convert?
You can convert between 8 units, including watt, kilowatt, megawatt, milliwatt, and more.
Where is power conversion useful?
It is commonly needed when engines, appliances, solar panels, and HVAC sizing.
Does this converter mix measurement systems?
The converter supports SI, Imperial, Metric units and keeps their exact definitions separate so results stay accurate.