Converters
Power Unit Converter
Enter a value once, pick its unit, and see it converted to every other power unit — watts, kilowatts, horsepower, BTU/h, and more — instantly.
Converted to all power units
Tip: click any row to make that unit the input.
How It Works
Every unit is converted through the watt (W), the SI unit of power, using exact defined factors (1 mechanical hp = 745.6999 W, 1 metric hp = 735.49875 W, 1 BTU/h = 0.29307 W). The list updates live as you type.
Example
100 kW = 134.10 hp (mechanical) = 135.96 hp (metric) = 341,214 BTU/h
Frequently Asked Questions
How do I convert between two specific units?
Enter your value, select the unit it's in from the "From unit" dropdown, and read the result off the row for the unit you want. Clicking a row makes that unit the new input, so you can chain conversions.
How many kW is one horsepower?
1 mechanical hp (550 ft·lbf/s) = 0.7457 kW; 1 metric hp (75 kgf·m/s, "PS/cv") = 0.7355 kW. Car makers in Europe usually quote metric hp.
What is BTU/h used for?
BTU per hour rates heating and cooling equipment, especially in the US. 1 kW ≈ 3,412 BTU/h; a 12,000 BTU/h air conditioner ≈ 3.52 kW of cooling.
Are the conversion factors exact?
Yes. Both horsepowers are exact by definition (550 ft·lbf/s and 75 kgf·m/s), and BTU/h and kcal/h derive exactly from the IT BTU (1,055.05585262 J) and IT calorie (4.1868 J). Displayed results are rounded for readability.