# Megajoules to Watt-Hours Converter

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

**Results in Watt-Hours:**

Do you want to convert watt-hours to megajoules?

## How to Convert Megajoules to Watt-Hours

To convert a measurement in megajoules to a measurement in watt-hours, multiply the energy by the following conversion ratio: 277.777778 watt-hours/megajoule.

Since one megajoule is equal to 277.777778 watt-hours, you can use this simple formula to convert:

watt-hours = megajoules × 277.777778

The energy in watt-hours is equal to the energy in megajoules multiplied by 277.777778.

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

### How Many Watt-Hours Are in a Megajoule?

There are **277.777778** watt-hours in a megajoule, which is why we use this value in the formula above.

1 MJ = 277.777778 Wh

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

## What Is a Megajoule?

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

The megajoule is a multiple of the joule, which is the SI derived unit for energy. In the metric system, "mega" is the prefix for millions, or 10^{6}. Megajoules can be abbreviated as *MJ*; for example, 1 megajoule can be written as 1 MJ.

Learn more about megajoules.

## What Is a Watt-Hour?

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]}

Learn more about watt-hours.

## Megajoule to Watt-Hour Conversion Table

Megajoules | Watt-hours |
---|---|

1 MJ | 277.78 Wh |

2 MJ | 555.56 Wh |

3 MJ | 833.33 Wh |

4 MJ | 1,111 Wh |

5 MJ | 1,389 Wh |

6 MJ | 1,667 Wh |

7 MJ | 1,944 Wh |

8 MJ | 2,222 Wh |

9 MJ | 2,500 Wh |

10 MJ | 2,778 Wh |

11 MJ | 3,056 Wh |

12 MJ | 3,333 Wh |

13 MJ | 3,611 Wh |

14 MJ | 3,889 Wh |

15 MJ | 4,167 Wh |

16 MJ | 4,444 Wh |

17 MJ | 4,722 Wh |

18 MJ | 5,000 Wh |

19 MJ | 5,278 Wh |

20 MJ | 5,556 Wh |

21 MJ | 5,833 Wh |

22 MJ | 6,111 Wh |

23 MJ | 6,389 Wh |

24 MJ | 6,667 Wh |

25 MJ | 6,944 Wh |

26 MJ | 7,222 Wh |

27 MJ | 7,500 Wh |

28 MJ | 7,778 Wh |

29 MJ | 8,056 Wh |

30 MJ | 8,333 Wh |

31 MJ | 8,611 Wh |

32 MJ | 8,889 Wh |

33 MJ | 9,167 Wh |

34 MJ | 9,444 Wh |

35 MJ | 9,722 Wh |

36 MJ | 10,000 Wh |

37 MJ | 10,278 Wh |

38 MJ | 10,556 Wh |

39 MJ | 10,833 Wh |

40 MJ | 11,111 Wh |

## 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 Megajoule & Watt-Hour Conversions

- megajoules to joules
- megajoules to kilojoules
- megajoules to gigajoules
- megajoules to calories
- megajoules to kilocalories
- megajoules to megacalories
- megajoules to kilowatt-hours
- megajoules to megawatt-hours
- megajoules to watt-seconds
- megajoules to british thermal units
- megajoules to million BTU
- megajoules to therms
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- megajoules to electronvolts
- megajoules to kiloelectronvolts
- megajoules to megaelectronvolts
- joules to watt-hours
- kilojoules to watt-hours
- gigajoules to watt-hours
- calories to watt-hours
- kilocalories to watt-hours
- megacalories to watt-hours
- kilowatt-hours to watt-hours
- megawatt-hours to watt-hours
- watt-seconds to watt-hours
- british thermal units to watt-hours
- million BTU to watt-hours
- therms to watt-hours
- quads to watt-hours
- electronvolts to watt-hours
- kiloelectronvolts to watt-hours
- megaelectronvolts to watt-hours