Power and Energy
GJtoJ
Convert gigajoules (GJ) to joules (J).
Factor1 GJ = 1e+9 J
Converter
GJ
Accepts numbers or expressions, e.g. 150 + 14.7
Result
J
Rendered to 6 significant figures.
Formula
Formula
J = GJ × 1e+9
Multiply any value in gigajoules by 1e+9 to obtain the value in joules.
Worked example
Convert 1 GJ to J.
- 01Start with 1 GJ.
- 02Multiply by the conversion factor: 1 × 1e+9 = 1e+9 J.
Result1 GJ = 1e+9 J
Conversion table
| GJ | J |
|---|---|
| 1 | 1e+9 |
| 2 | 2e+9 |
| 5 | 5e+9 |
| 10 | 1e+10 |
| 20 | 2e+10 |
| 50 | 5e+10 |
| 100 | 1e+11 |
| 200 | 2e+11 |
| 500 | 5e+11 |
| 1000 | 1e+12 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from GJ to J?
1 GJ equals 1e+9 J. To convert, multiply the value in gigajoules by 1e+9.
How do I convert 1 GJ to J?
1 GJ = 1e+9 J. For any value, multiply by 1e+9.
How do I convert J back to GJ?
Divide by the same factor — or equivalently, multiply by 1e-9. So 1 J = 1e-9 GJ.
When would I need to convert gigajoule to joule?
Energy conversions are needed when reconciling fuel/electrical billing, calculating thermal duties, and aligning calorimetry or HHV/LHV figures across data sources.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).