# Power Unit Converters

## All-in-One Power Converter

This all-in-one power converter lets you calculate all power units at once. Convert between power units including BTU/hr, decibel-milliwatt, decibel-watt, gigawatt, electric horsepower, imperial horsepower, kilowatt, megawatt, milliwatt, and watt.

## All Power Converters

The power converters below provide more detail about converting between the individual power units. Each one includes a definition of the individual power units, step-by-step instructions on performing the conversion, conversion examples, together with conversion charts and other visualisations.

## What Power Units Are Supported?

NameSymbolMeasurement SystemDescription
milliwattmWInternational System of Units (SI) / Metric SystemA milliwatt (mW) is a unit of power that measures the rate at which energy is transferred or work is done. It is equal to one thousandth (1/1000) of a watt. To understand the concept of a milliwatt, let's consider an example:
wattWInternational System of Units (SI) / Metric SystemA watt (W) is a unit of power that measures the rate at which energy is transferred, used, or produced. It represents the amount of energy consumed or generated per unit of time. Here's an example to help illustrate the concept of a watt:
kilowattkWInternational System of Units (SI) / Metric SystemA kilowatt (kW) is a unit of power that measures the rate at which energy is transferred, used, or produced. It is equal to 1,000 watts, which means it represents a larger amount of power compared to a single watt. Let's explore an example to better understand a kilowatt:
megawattMWInternational System of Units (SI) / Metric SystemA megawatt (MW) is a unit of power that measures the rate at which energy is transferred, used, or produced on a large scale. It is equal to one million watts or 1,000 kilowatts. Let's delve into an example to better understand a megawatt:
gigawattGWInternational System of Units (SI) / Metric SystemA gigawatt (GW) is a unit of power that measures the rate at which energy is transferred, used, or produced on a very large scale. It is equal to one billion watts or 1,000 megawatts. Let's explore an example to better understand a gigawatt:
decibel-milliwattdBmNon-SI (International)A decibel milliwatt (dBm) is a unit of power measurement used in telecommunications and signal processing to express power levels relative to a reference power of 1 milliwatt. It represents the logarithmic ratio of the measured power to the reference power.
decibel-wattdBWNon-SI (International)A decibel milliwatt (dBm) is a unit of power measurement used in telecommunications and signal processing to express power levels relative to a reference power of 1 milliwatt. It represents the logarithmic ratio of the measured power to the reference power. Here's an explanation with an example:
imperial horsepowerhp(I)United States customary / Imperial systemImperial horsepower (hp) is a unit of power primarily used in the United Kingdom and other countries following the British imperial system. It is a measure of the rate at which work is done or energy is transferred. The imperial horsepower is defined as approximately 745.7 watts, which is slightly larger than the metric horsepower.
electric horsepowerehpUnited States customary / Imperial systemElectric horsepower (ehp) is a unit of power that specifically refers to the power output of an electric motor. It measures the rate at which electrical energy is converted into mechanical work or power. Electric horsepower is defined as 746 watts, which is equivalent to one mechanical horsepower (hp).
BTU/hrBTU/hrUnited States customary / Imperial systemBTU/hr stands for British Thermal Units per hour and is a unit of power used to measure the rate of heat transfer or energy conversion. It represents the amount of energy needed to raise the temperature of one pound of water by one degree Fahrenheit in one hour.