Power Unit Converter

Enter a value and select a starting unit to see all available conversion results.

Power Units and Descriptions

Below are descriptions and historical context for each Power unit available in this converter.

Microwatt (μW)

Microwatt, used for very low power devices like sensors and microelectronics.

Milliwatt (mW)

Milliwatt, commonly used for small electronic devices and laser power ratings.

Watt (W)

Named after James Watt. The SI unit of power, defined as one joule per second.

Kilowatt (kW)

Kilowatt, commonly used for household appliances and small motors (1 kW = 1.34 hp).

Megawatt (MW)

Megawatt, used for large power plants and industrial facilities (1 MW = 1000 kW).

Gigawatt (GW)

Gigawatt, used for very large power plants and national power generation capacity.

Horsepower (hp)

Horsepower, defined by James Watt as the power of a draft horse. Still used for engines.

BTU per Hour (BTU/h)

BTU per hour, commonly used in HVAC for heating and cooling capacity ratings.

Calorie per Second (cal/s)

Calorie per second, is sometimes used in thermodynamics and heat transfer calculations.

Kilocalorie per Hour (kcal/h)

Kilocalorie per hour, is used in some European heating and metabolic rate applications.

Base Unit Conversion Factors

The table below shows the conversion factors from each unit to the base unit, which is the Watt (W).

  • 1 Watt (W) = 1000000 Microwatt (μW)
  • 1 Watt (W) = 1000 Milliwatt (mW)
  • 1 Watt (W) = 1 Watt (W)
  • 1 Watt (W) = 0.001 Kilowatt (kW)
  • 1 Watt (W) = 1.0E-6 Megawatt (MW)
  • 1 Watt (W) = 1.0E-9 Gigawatt (GW)
  • 1 Watt (W) = 0.0013410218586563 Horsepower (hp)
  • 1 Watt (W) = 3.412142450123 BTU per Hour (BTU/h)
  • 1 Watt (W) = 0.2388458966275 Calorie per Second (cal/s)
  • 1 Watt (W) = 0.86042229526251 Kilocalorie per Hour (kcal/h)