Convert gigajoules to megajoules
1 GJ = 1000 MJ — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
1000MJ
1 GJ = 1000 MJ
How to convert gigajoules to megajoules
Multiply the number of gigajoules by 1000 to get megajoules.
The exact factor is 1000 .
Gigajoule to Megajoule conversion table
| Gigajoules (GJ) | Megajoules (MJ) |
|---|---|
| 1 GJ | 1000 |
| 2 GJ | 2000 |
| 3 GJ | 3000 |
| 5 GJ | 5000 |
| 10 GJ | 10 000 |
| 20 GJ | 20 000 |
| 25 GJ | 25 000 |
| 50 GJ | 50 000 |
| 100 GJ | 100 000 |
| 250 GJ | 250 000 |
| 500 GJ | 500 000 |
| 1000 GJ | 1 000 000 |
Megajoule to Gigajoule conversion table
| Megajoules (MJ) | Gigajoules (GJ) |
|---|---|
| 1 MJ | 0.001 |
| 2 MJ | 0.002 |
| 3 MJ | 0.003 |
| 5 MJ | 0.005 |
| 10 MJ | 0.01 |
| 20 MJ | 0.02 |
| 25 MJ | 0.025 |
| 50 MJ | 0.05 |
| 100 MJ | 0.1 |
| 250 MJ | 0.25 |
| 500 MJ | 0.5 |
| 1000 MJ | 1 |
Frequently asked
How many megajoules are in a gigajoule?
One gigajoule equals 1000 megajoules (GJ → MJ). That figure is exact, not rounded.
How do you convert gigajoules to megajoules?
Multiply the number of gigajoules by 1000 to get megajoules.
What is 1 MJ in gigajoules?
One megajoule is 0.001 gigajoules.
What is 10 GJ in MJ?
10 GJ = 10 000 MJ.