# Watt-hours to Megajoules Conversion

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

**Results in Megajoules:**

## How to Convert Watt-hours to Megajoules

To convert a watt-hour measurement to a megajoule measurement, multiply the energy by the conversion ratio. One watt-hour is equal to 0.0036 megajoules, so use this simple formula to convert:

The energy in megajoules is equal to the watt-hours multiplied by 0.0036.

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

Watt-hours and megajoules 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]}

## Megajoules

One megajoule is equal to 1,000,000 joules, which are 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 10^{6}. Megajoules can be abbreviated as *MJ*; for example, 1 megajoule can be written as 1 MJ.

## Watt-hour to Megajoule Conversion Table

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

1 Wh | 0.0036 MJ |

2 Wh | 0.0072 MJ |

3 Wh | 0.0108 MJ |

4 Wh | 0.0144 MJ |

5 Wh | 0.018 MJ |

6 Wh | 0.0216 MJ |

7 Wh | 0.0252 MJ |

8 Wh | 0.0288 MJ |

9 Wh | 0.0324 MJ |

10 Wh | 0.036 MJ |

20 Wh | 0.072 MJ |

30 Wh | 0.108 MJ |

40 Wh | 0.144 MJ |

50 Wh | 0.18 MJ |

60 Wh | 0.216 MJ |

70 Wh | 0.252 MJ |

80 Wh | 0.288 MJ |

90 Wh | 0.324 MJ |

100 Wh | 0.36 MJ |

200 Wh | 0.72 MJ |

300 Wh | 1.08 MJ |

400 Wh | 1.44 MJ |

500 Wh | 1.8 MJ |

600 Wh | 2.16 MJ |

700 Wh | 2.52 MJ |

800 Wh | 2.88 MJ |

900 Wh | 3.24 MJ |

1,000 Wh | 3.6 MJ |

## 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