Watt-hours to Gigajoules Conversion

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

Results in Gigajoules:
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1 Wh = 3.6E-6 GJ

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:

gigajoules = watt-hours × 3.6E-6

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.
500,000 Wh = (500,000 × 3.6E-6) = 1.8 GJ

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


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

Watt-hours can be abbreviated as Wh, for example 1 watt-hour can be written as 1 Wh.


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 109. Gigajoules can be abbreviated as GJ, for example 1 gigajoule can be written as 1 GJ.

Watt-hour to Gigajoule Conversion Table

Watt-hour measurements converted to gigajoules
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