Power Converter — Watts, kW, HP, BTU/h, MW
Convert power between Watts, kilowatts, horsepower, BTU/h, and megawatts instantly.
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Power Unit Reference
| Unit | Symbol | In Watts | Use Case |
|---|---|---|---|
| Watt | W | 1 | SI unit, appliance ratings |
| Kilowatt | kW | 1,000 | Electricity billing, motors |
| Megawatt | MW | 1,000,000 | Power plants |
| Horsepower | HP | 745.7 | Engines, generators |
| BTU/h | BTU/h | 0.2931 | AC capacity, heaters |
Frequently Asked Questions
What is the difference between Watts and horsepower?
1 mechanical horsepower (HP) = 745.7 Watts. Horsepower is used for engines and motors, while Watts is the SI unit used for electrical and general power measurement.
What is BTU/h used for?
BTU per hour (BTU/h) is used to rate the cooling or heating capacity of air conditioners and heat pumps. A "1 HP" AC unit typically produces about 9,000 BTU/h of cooling.
How do I convert kW to HP?
1 kW = 1.341 HP. Multiply kilowatts by 1.341 to get mechanical horsepower. For example, a 100 kW engine produces about 134 HP.
What is a megawatt (MW)?
1 MW = 1,000,000 Watts = 1,000 kW. Power plants and large industrial facilities are rated in megawatts. A typical Nigerian home uses about 0.5–2 kW on average.
How does power relate to energy?
Energy = Power × Time. If a 1 kW appliance runs for 1 hour, it consumes 1 kWh of energy. This is what appears on your electricity bill.