Convert Gigajoule to Watt-hour
Convert gigajoules to watt-hours by entering a value below.
How to Convert Gigajoules to Watt-hours
The gigajoule and watt-hour are both units of energy. 1 gigajoule equals 277777.77778 watt-hours. This means to convert gigajoules to watt-hours, you multiply by 277777.77778.
Formula
Step-by-Step Example
Convert 5 GJ to watt-hours:
We need to convert gigajoules to watt-hours
Since 1 GJ = 277777.77778 Wh, multiply by 277777.77778
5 × 277777.77778 = 1388888.8889
5 GJ = 1388888.8889 Wh
Gigajoule to Watt-hour Conversion Table
Quick reference table for common gigajoule to watt-hour conversions. Click any value for detailed calculation.
| Gigajoules (GJ) | Watt-hours (Wh) |
|---|---|
| 0.1 GJ | 27777.777778 Wh |
| 0.5 GJ | 138888.88889 Wh |
| 1 GJ | 277777.77778 Wh |
| 2 GJ | 555555.55556 Wh |
| 5 GJ | 1388888.8889 Wh |
| 10 GJ | 2777777.7778 Wh |
| 25 GJ | 6944444.4444 Wh |
| 50 GJ | 13888888.889 Wh |
| 100 GJ | 27777777.778 Wh |
About These Units
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.
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.
Frequently Asked Questions
How do I convert gigajoules to watt-hours?
To convert gigajoules to watt-hours, multiply the value by 277777.77778. For example, 10 GJ = 2777777.7778 Wh.
How many watt-hours are in 1 gigajoule?
1 gigajoule equals 277777.77778 watt-hours.
What is the formula for gigajoules to watt-hours?
The formula is: Wh = GJ × 277777.77778.