Convert Watt-hour to Gigajoule
Convert watt-hours to gigajoules by entering a value below.
How to Convert Watt-hours to Gigajoules
The watt-hour and gigajoule are both units of energy. 1 gigajoule equals 277777.77778 watt-hours. This means to convert watt-hours to gigajoules, you divide by 277777.77778.
Formula
Step-by-Step Example
Convert 5 Wh to gigajoules:
We need to convert watt-hours to gigajoules
Since 1 GJ = 277777.77778 Wh, divide by 277777.77778
5 ÷ 277777.77778 = 1.8e-5
5 Wh = 1.8e-5 GJ
Watt-hour to Gigajoule Conversion Table
Quick reference table for common watt-hour to gigajoule conversions. Click any value for detailed calculation.
| Watt-hours (Wh) | Gigajoules (GJ) |
|---|---|
| 0.1 Wh | 3.6e-7 GJ |
| 0.5 Wh | 1.8e-6 GJ |
| 1 Wh | 3.6e-6 GJ |
| 2 Wh | 7.2e-6 GJ |
| 5 Wh | 1.8e-5 GJ |
| 10 Wh | 3.6e-5 GJ |
| 25 Wh | 9e-5 GJ |
| 50 Wh | 0.00018 GJ |
| 100 Wh | 0.00036 GJ |
About These Units
Watt-hour (Wh)
A watt-hour (Wh) is the energy of one watt sustained for one hour, equal to 3,600 joules. Watt-hours measure battery capacity (smartphone: 10-15 Wh, laptop: 50-100 Wh) and small appliance energy use. One Wh equals 3.6 kilojoules.
Gigajoule (GJ)
A gigajoule (GJ) equals 1 billion joules or approximately 277.8 kilowatt-hours. Gigajoules measure natural gas billing, industrial energy use, and building energy consumption. One GJ equals about 26.8 cubic meters of natural gas.
Frequently Asked Questions
How do I convert watt-hours to gigajoules?
To convert watt-hours to gigajoules, divide the value by 277777.77778. For example, 10 Wh = 3.6e-5 GJ.
How many gigajoules are in 1 watt-hour?
1 watt-hour equals 3.6e-6 gigajoules.
What is the formula for watt-hours to gigajoules?
The formula is: GJ = Wh ÷ 277777.77778.