# Watt-hours to Gigajoules Conversion

Enter the energy in watt-hours below to get the value converted to gigajoules.

**Results in Gigajoules:**

## How to Convert Watt-hours to Gigajoules

To convert a watt-hour measurement to a gigajoule measurement, multiply the energy by the conversion ratio. One watt-hour is equal to 3.6E-6 gigajoules, so use this simple formula to convert:

The energy in gigajoules is equal to the watt-hours multiplied by 3.6E-6.

**For example,**here's how to convert 500,000 watt-hours to gigajoules using the formula above.

Watt-hours and gigajoules are both units used to measure energy. Keep reading to learn more about each unit of measure.

## Watt-hours

The watt-hour is a measure of electrical energy equal to one watt of power over a one hour period.

Watt-hours are usually abbreviated as *Wh*, although the formally adopted expression is *W·h*. The abbreviation *W h* is also sometimes used. For example, 1 watt-hour can be written as 1 Wh, 1 W·h, or 1 W h.

In formal expressions, the centered dot (·) or space is used to separate units used to indicate multiplication in an expression and to avoid conflicting prefixes being misinterpreted as a unit symbol.^{[1]}

## Gigajoules

One gigajoule is equal to 1,000,000,000 joules, which are the energy equal to the force on an object of one newton at a distance of one meter.

The gigajoule is a multiple of the joule, which is the SI derived unit for energy. In the metric system, "giga" is the prefix for 10^{9}. Gigajoules can be abbreviated as *GJ*; for example, 1 gigajoule can be written as 1 GJ.

## Watt-hour to Gigajoule Conversion Table

Watt-hours | Gigajoules |
---|---|

1 Wh | 0.0000036 GJ |

2 Wh | 0.0000072 GJ |

3 Wh | 0.0000108 GJ |

4 Wh | 0.0000144 GJ |

5 Wh | 0.000018 GJ |

6 Wh | 0.0000216 GJ |

7 Wh | 0.0000252 GJ |

8 Wh | 0.0000288 GJ |

9 Wh | 0.0000324 GJ |

10 Wh | 0.000036 GJ |

100 Wh | 0.00036 GJ |

1,000 Wh | 0.0036 GJ |

10,000 Wh | 0.036 GJ |

100,000 Wh | 0.36 GJ |

1,000,000 Wh | 3.6 GJ |

## References

- Bureau International des Poids et Mesures, The International System of Units (SI), 9th edition, 2019, https://www.bipm.org/utils/common/pdf/si-brochure/SI-Brochure-9-EN.pdf