Table Of Contents
Gigajoule to watt-hour Conversion
1 gigajoule (GJ) is equal to 277777.7778 watt-hour (W⋅hr).
1 GJ = 277777.7778 W⋅hr
or
1 W⋅hr = 0.0000036 GJ
Formula
To convert a energy from gigajoule (GJ) to watt-hour (W⋅hr), multiply the energy in gigajoule by 277777.7778
e(W⋅hr) = e(GJ) × 277777.7778
Examples:
Convert 100 gigajoule to watt-hour:
e(W⋅hr) = 100GJ × 277777.7778 = 27777777.78 W⋅hr
Conversion table
| Gigajoule (GJ) | Watt-hour (W⋅hr) |
|---|---|
| 1 GJ | 277777.777777778 W⋅hr |
| 2 GJ | 555555.555555556 W⋅hr |
| 3 GJ | 833333.333333333 W⋅hr |
| 5 GJ | 1388888.888888889 W⋅hr |
| 10 GJ | 2777777.777777778 W⋅hr |
| 20 GJ | 5555555.555555555 W⋅hr |
| 25 GJ | 6944444.444444444 W⋅hr |
| 50 GJ | 1.3888888888888888e7 W⋅hr |
| 100 GJ | 2.7777777777777776e7 W⋅hr |
| 250 GJ | 6.944444444444443e7 W⋅hr |
| 500 GJ | 1.3888888888888887e8 W⋅hr |
| 1000 GJ | 2.7777777777777773e8 W⋅hr |
| Watt-hour (W⋅hr) | Gigajoule (GJ) |
|---|---|
| 1 W⋅hr | 3.6e-6 GJ |
| 2 W⋅hr | 7.2e-6 GJ |
| 3 W⋅hr | 1.08e-5 GJ |
| 5 W⋅hr | 1.8e-5 GJ |
| 10 W⋅hr | 3.6e-5 GJ |
| 20 W⋅hr | 7.2e-5 GJ |
| 25 W⋅hr | 9e-5 GJ |
| 50 W⋅hr | 1.8e-4 GJ |
| 100 W⋅hr | 3.6e-4 GJ |
| 250 W⋅hr | 9.0e-4 GJ |
| 500 W⋅hr | 0.0018 GJ |
| 1000 W⋅hr | 0.0036 GJ |
Frequently asked questions
How do I convert gigajoule to watt-hour?
Multiply the value in gigajoule by 277777.7778 to get the result in watt-hour. For example, 5 GJ × 277777.7778 = 1388888.888888889 W⋅hr.
How many watt-hour are in 1 gigajoule?
1 gigajoule (GJ) is equal to 277777.777777778 watt-hour (W⋅hr).
How do I convert watt-hour back to gigajoule?
Use the inverse operation: divide the value in watt-hour by 277777.7778 to get the result in gigajoule.
How accurate is the gigajoule to watt-hour conversion?
The converter multiplies by the conversion factor 277777.7778 and rounds the result to 9 decimal places by default. You can increase or reduce the precision with the digits option on this page.
Sources
Conversion factors are based on internationally recognised standards:
- BIPM — The International System of Units (SI Brochure, 9th edition)
- NIST Guide to the SI, Appendix B.8: Factors for Units Listed Alphabetically (NIST SP 811, 2008 edition)
- NIST Guide to the SI (SP 811), Footnotes (notes 22 and 23)
- CODATA Value: electron volt-joule relationship (NIST Fundamental Physical Constants)