# Watt hour conversions

energy conversions » watt hour conversionsThe watt hour conversion selector on this page selects the energy measurement unit to convert to starting from watt hours (Wh). To make a conversion starting from a unit of energy other than watt hour, simply click on the "Reset" button.

## What is watt hour?

The **watt hour** (or **watt-hour**) is a unit of energy equal to 3,600 joules (1 Wh = 3,600 J), the SI derived unit of energy. It is also equal to 3.6 kilojoules (kJ), or 0.86042065 kilocalories (thermochemical) (kcal), or 3,600 watt seconds (Ws), or 0.001 kilowatt hours (kWh), or 10-6 megawatt hours (MWh) or 10-9 gigawatt hours (GWh).

The watt hour is the energy required to produce one watt of power for one hour. The watt (W) is a derived unit of power in the SI while the hour (h) is a non-SI unit of time.

Common subdivisions and multiples of the watt hour using the SI prefixes:

- 1 milliwatt hour (mWh) = 10-3 watt hours (Wh)
- 1 microwatt hour (μWh) = 10-6 watt hours (Wh)
- 1 nanowatt hour (nWh) = 10-9 watt hours (Wh)
- 1 picowatt hour (pWh) = 10-12 watt hours (Wh)
- ............................................
- 1 kilowatt hour (kWh) = 103 watt hours (Wh)
- 1 megawatt hour (MWh) = 106 watt hours (Wh)
- 1 gigawatt hour (GWh) = 109 watt hours (Wh)
- 1 terawatt hour (TWh) = 1012 watt hours (Wh)
- 1 petawatt hour (PWh) = 1015 watt hours (Wh)

*Note:*

The SI is an abbreviation for the International System of Units.

*Symbol:*

Wh

*Plural:*

watt hours

*Also known as:*

watt-hour (plural: watt-hours)

## Watt hour conversions: quick links

A detailed list with conversions from watt hours to other (metric, imperial, or customary) energy measurement units is displayed below.

- watt hour to barrel of oil equivalent (Wh to BOE)
- watt hour to British thermal unit (59 F)
- watt hour to British thermal unit (IT) (Wh to BTU)
- watt hour to calorie (Wh to cal)
- watt hour to calorie (15 C) (Wh to cal)
- watt hour to calorie (IT) (Wh to cal)
- watt hour to Celsius heat unit (IT) (Wh to CHU)
- watt hour to cubic foot of natural gas
- watt hour to electron volt (Wh to eV)
- watt hour to erg (Wh to erg)
- watt hour to foot-pound force (Wh to ft lbf)
- watt hour to foot-poundal (Wh to ft pdl)
- watt hour to gallon-atmosphere (UK) (Wh to gal atm)
- watt hour to gallon-atmosphere (US) (Wh to gal atm)
- watt hour to giga-electron volt (Wh to GeV)
- watt hour to gigacalorie (Wh to Gcal)
- watt hour to gigajoule (Wh to GJ)
- watt hour to gigawatt hour (Wh to GWh)
- watt hour to Hartree (Wh to Ha)
- watt hour to horsepower-hour (Wh to hph)
- watt hour to inch-pound force (Wh to in lbf)
- watt hour to joule (Wh to J)
- watt hour to kilo-electron volt (Wh to keV)
- watt hour to kilocalorie (Wh to kcal)
- watt hour to kilojoule (Wh to kJ)
- watt hour to kilowatt hour (Wh to kWh)
- watt hour to liter-atmosphere (Wh to L atm)
- watt hour to mega-electron volt (Wh to MeV)
- watt hour to megacalorie (Wh to Mcal)
- watt hour to megajoule (Wh to MJ)
- watt hour to megawatt hour (Wh to MWh)
- watt hour to microjoule (Wh to μJ)
- watt hour to milli-electron volt (Wh to meV)
- watt hour to millijoule (Wh to mJ)
- watt hour to nanojoule (Wh to nJ)
- watt hour to Newton metre (Wh to Nm)
- watt hour to standard cubic centimeter (Wh to scc)
- watt hour to standard cubic foot (Wh to scf)
- watt hour to standard cubic yard (Wh to scy)
- watt hour to tera-electron volt (Wh to TeV)
- watt hour to terajoule (Wh to TJ)
- watt hour to terawatt hour (Wh to TWh)
- watt hour to ton of coal equivalent (Wh to TCE)
- watt hour to ton of oil equivalent (Wh to TOE)
- watt hour to watt second (Wh to Ws)