Power and Energy
JtoGJ
Convert joules (J) to gigajoules (GJ).
Factor1 J = 1e-9 GJ
Converter
J
Accepts numbers or expressions, e.g. 150 + 14.7
Result
GJ
Rendered to 6 significant figures.
Formula
Formula
GJ = J × 1e-9
Multiply any value in joules by 1e-9 to obtain the value in gigajoules.
Worked example
Convert 1e+9 J to GJ.
- 01Start with 1e+9 J.
- 02Multiply by the conversion factor: 1e+9 × 1e-9 = 1 GJ.
Result1e+9 J = 1 GJ
Conversion table
| J | GJ |
|---|---|
| 1 | 1e-9 |
| 2 | 2e-9 |
| 5 | 5e-9 |
| 10 | 1e-8 |
| 20 | 2e-8 |
| 50 | 5e-8 |
| 100 | 1e-7 |
| 200 | 2e-7 |
| 500 | 5e-7 |
| 1000 | 1e-6 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from J to GJ?
1 J equals 1e-9 GJ. To convert, multiply the value in joules by 1e-9.
How do I convert 1 J to GJ?
1 J = 1e-9 GJ. For any value, multiply by 1e-9.
How do I convert GJ back to J?
Divide by the same factor — or equivalently, multiply by 1e+9. So 1 GJ = 1e+9 J.
When would I need to convert joule to gigajoule?
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).