# Gigajoules to Megawatt-Hours Converter

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

**Results in Megawatt-Hours:**

Do you want to convert megawatt-hours to gigajoules?

## How to Convert Gigajoules to Megawatt-Hours

To convert a measurement in gigajoules to a measurement in megawatt-hours, multiply the energy by the following conversion ratio: 0.277778 megawatt-hours/gigajoule.

Since one gigajoule is equal to 0.277778 megawatt-hours, you can use this simple formula to convert:

The energy in megawatt-hours is equal to the energy in gigajoules multiplied by 0.277778.

**For example,**here's how to convert 5 gigajoules to megawatt-hours using the formula above.

### How Many Megawatt-Hours Are in a Gigajoule?

There are **0.277778** megawatt-hours in a gigajoule, which is why we use this value in the formula above.

1 GJ = 0.277778 MWh

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

## What is a Gigajoule?

One gigajoule is equal to 1,000,000,000 joules, which is 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 billions, or 10^{9}. Gigajoules can be abbreviated as *GJ*; for example, 1 gigajoule can be written as 1 GJ.

Learn more about gigajoules.

## What is a Megawatt-Hour?

A megawatt-hour is a measure of electrical energy equal to one megawatt, or 1,000,000 watts, of power over a one hour period. Megawatt-hours are a measure of electrical work performed over a period of time, and are often used as a way of measuring energy usage by electric companies.

Megawatt-hours are usually abbreviated as *MWh*, although the formally adopted expression is *MW·h*. The abbreviation *MW h* is also sometimes used. For example, 1 megawatt-hour can be written as 1 MWh, 1 MW·h, or 1 MW 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]}

Learn more about megawatt-hours.

## Gigajoule to Megawatt-Hour Conversion Table

Gigajoules | Megawatt-hours |
---|---|

1 GJ | 0.277778 MWh |

2 GJ | 0.555556 MWh |

3 GJ | 0.833333 MWh |

4 GJ | 1.1111 MWh |

5 GJ | 1.3889 MWh |

6 GJ | 1.6667 MWh |

7 GJ | 1.9444 MWh |

8 GJ | 2.2222 MWh |

9 GJ | 2.5 MWh |

10 GJ | 2.7778 MWh |

11 GJ | 3.0556 MWh |

12 GJ | 3.3333 MWh |

13 GJ | 3.6111 MWh |

14 GJ | 3.8889 MWh |

15 GJ | 4.1667 MWh |

16 GJ | 4.4444 MWh |

17 GJ | 4.7222 MWh |

18 GJ | 5 MWh |

19 GJ | 5.2778 MWh |

20 GJ | 5.5556 MWh |

21 GJ | 5.8333 MWh |

22 GJ | 6.1111 MWh |

23 GJ | 6.3889 MWh |

24 GJ | 6.6667 MWh |

25 GJ | 6.9444 MWh |

26 GJ | 7.2222 MWh |

27 GJ | 7.5 MWh |

28 GJ | 7.7778 MWh |

29 GJ | 8.0556 MWh |

30 GJ | 8.3333 MWh |

31 GJ | 8.6111 MWh |

32 GJ | 8.8889 MWh |

33 GJ | 9.1667 MWh |

34 GJ | 9.4444 MWh |

35 GJ | 9.7222 MWh |

36 GJ | 10 MWh |

37 GJ | 10.28 MWh |

38 GJ | 10.56 MWh |

39 GJ | 10.83 MWh |

40 GJ | 11.11 MWh |

## References

- Bureau International des Poids et Mesures, The International System of Units (SI), 9th edition, 2019, https://www.bipm.org/documents/20126/41483022/SI-Brochure-9-EN.pdf

## More Gigajoule & Megawatt-Hour Conversions

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- quads to megawatt-hours
- electronvolts to megawatt-hours
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