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Power Converter

Convert power between watts, kilowatts, megawatts, mechanical horsepower, metric horsepower, and BTU per hour.

Convert instantly
Enter a value and choose the units. Your answer updates as you type.

Result

0.001 Kilowatt (kW)

Quick reference
  • Watt (W)1 base units
  • Kilowatt (kW)1000 base units
  • Megawatt (MW)1000000 base units
  • Gigawatt (GW)1000000000 base units
  • Mechanical horsepower (hp)745.699871582 base units
  • Metric horsepower (PS)735.49875 base units
  • BTU per hour (BTU/h)0.29307107 base units

About the Power Converter

Power measures how quickly energy is transferred or work is done. Watts and kilowatts are common in electrical systems, while engines may use mechanical horsepower and heating equipment often uses BTU per hour. For example, 1 kW equals 1,000 W. This converter keeps mechanical horsepower (exactly 550 ft·lbf/s) distinct from metric horsepower.

Live conversion makes it easy to compare motor ratings, appliance loads, solar output, and heating capacity. For example, 2.5 kW is 2,500 W. Use the Energy Converter for the total work over time, or the Force Converter when a mechanical specification also gives force.

Frequently asked questions

How many watts are in one horsepower?

One mechanical horsepower is approximately 745.699871582 watts; metric horsepower is approximately 735.49875 watts.

Is kW the same as kWh?

No. A kilowatt is power; a kilowatt-hour is energy delivered by one kilowatt over one hour.

How is BTU/h related to watts?

One international BTU per hour is approximately 0.29307107 watts.

Take this calculation further

Browse the converters calculators collection for more tools in this subject.

For a related calculation, use Energy Converter to convert energy accurately between joules, kilojoules, calories, kilocalories, watt-hours, kilowatt-hours, and BTU. Alternatively, use Moment of Inertia Converter to convert mass moment of inertia between kg·m², g·cm², kg·cm², lb·ft², lb·in², and slug·ft².

For the underlying method, read A Quick Guide to Temperature Conversion Formulas or Understanding Torque vs. Moment of Force: What's the Difference?.