Power Converter
Convert common units like length, volume and temperature. All local.
1 kW = 1.341022 HP
All conversions
Usage & Common Formulas
Enter a value on the left, choose From/To units, use Swap/Copy/Clear. All calculations run locally in your browser.
Power
- 1 kW = 1000 W
- 1 MW = 1,000,000 W
- 1 HP = 745.699872 W
- 1 PS = 735.49875 W
- 1 kcal/s = 4186.8 W
- 1 Btu/s = 1055.05585 W
- 1 ft·lb/s ≈ 1.3558179483 W
What is a power converter?
A power converter translates a rate of energy transfer between watts, kilowatts, horsepower and BTU per hour. It answers the practical question behind appliance and engine specs: how much work per second does this thing do?
It is used for sizing generators, comparing engine output with electric motors, and checking whether a circuit can carry a load.
How to convert a power rating
- Enter the power value.
- Select the source unit — watt, kilowatt, horsepower or BTU/h.
- Select the target unit.
- Read the converted value, which updates as you type.
- Remember 1 hp ≈ 745.7 W for mechanical horsepower.
Power conversion examples
Engine output
150 hp
111.855 kW (× 0.7457)
Appliance load
2000 W
6824.43 BTU/h (× 3.41214)
Power unit definitions
| Unit | Watts | Typical use |
|---|---|---|
| Watt (W) | 1 W | Appliances, electronics |
| Kilowatt (kW) | 1000 W | Motors, generators, EV charging |
| Mechanical horsepower | 745.699871582 W | Engines (US, UK) |
| BTU per hour | 0.29307107 W | Heating and cooling capacity |
Power conversion FAQ
How many watts is one horsepower?
Mechanical horsepower is 745.699871582 W; metric horsepower is 735.49875 W.
What is the difference between kW and kWh?
A kilowatt is power, a kilowatt-hour is energy — power multiplied by time.
How do I convert BTU/h to watts?
Multiply by 0.29307107. A 12,000 BTU/h air conditioner is about 3.52 kW.
Why do EV motors quote kW instead of hp?
Kilowatts are the SI unit and align with the electrical system that supplies the motor.
Can I add power ratings of appliances together?
Yes for a rough load estimate, but continuous loads should stay under about 80% of a circuit rating.