Convert joules to gigajoules
1 J = 0.000000001 GJ — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
1e-9GJ
Exact decimal: 0.000000001
As a fraction: 1/1000000000
1 J = 0.000000001 GJ
How to convert joules to gigajoules
Multiply the number of joules by 0.000000001 to get gigajoules.
The exact factor is 0.000000001 — as a fraction, 1/1000000000.
Joule to Gigajoule conversion table
| Joules (J) | Gigajoules (GJ) |
|---|---|
| 1 J | 1e-9 |
| 2 J | 2e-9 |
| 3 J | 3e-9 |
| 5 J | 5e-9 |
| 10 J | 1e-8 |
| 20 J | 2e-8 |
| 25 J | 2.5e-8 |
| 50 J | 5e-8 |
| 100 J | 0.000 000 1 |
| 250 J | 0.000 000 25 |
| 500 J | 0.000 000 5 |
| 1000 J | 0.000 001 |
Gigajoule to Joule conversion table
| Gigajoules (GJ) | Joules (J) |
|---|---|
| 1 GJ | 1 000 000 000 |
| 2 GJ | 2 000 000 000 |
| 3 GJ | 3 000 000 000 |
| 5 GJ | 5 000 000 000 |
| 10 GJ | 10 000 000 000 |
| 20 GJ | 20 000 000 000 |
| 25 GJ | 25 000 000 000 |
| 50 GJ | 50 000 000 000 |
| 100 GJ | 100 000 000 000 |
| 250 GJ | 250 000 000 000 |
| 500 GJ | 500 000 000 000 |
| 1000 GJ | 1 000 000 000 000 |
Frequently asked
How many gigajoules are in a joule?
One joule equals 1e-9 gigajoules (J → GJ). That figure is exact, not rounded.
How do you convert joules to gigajoules?
Multiply the number of joules by 0.000000001 to get gigajoules.
What is 1 GJ in joules?
One gigajoule is 1000000000 joules.
What is 10 J in GJ?
10 J = 1e-8 GJ.