Power and Energy
GJtoBTU
Convert gigajoules (GJ) to International Table BTUs (BTU).
Factor1 GJ = 947817.1 BTU
Converter
GJ
Accepts numbers or expressions, e.g. 150 + 14.7
Result
BTU
Rendered to 6 significant figures.
Formula
Formula
BTU = GJ × 947817.1
Multiply any value in gigajoules by 947817.1 to obtain the value in International Table BTUs.
Worked example
Convert 1 GJ to BTU.
- 01Start with 1 GJ.
- 02Multiply by the conversion factor: 1 × 947817.1 = 947817 BTU.
Result1 GJ = 947817 BTU
Conversion table
| GJ | BTU |
|---|---|
| 1 | 9.4782e+5 |
| 2 | 1.8956e+6 |
| 5 | 4.7391e+6 |
| 10 | 9.4782e+6 |
| 20 | 1.8956e+7 |
| 50 | 4.7391e+7 |
| 100 | 9.4782e+7 |
| 200 | 1.8956e+8 |
| 500 | 4.7391e+8 |
| 1000 | 9.4782e+8 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from GJ to BTU?
1 GJ equals 947817.1 BTU. To convert, multiply the value in gigajoules by 947817.1.
How do I convert 1 GJ to BTU?
1 GJ = 947817 BTU. For any value, multiply by 947817.1.
How do I convert BTU back to GJ?
Divide by the same factor — or equivalently, multiply by 1.055056e-6. So 1 BTU = 1.05506e-6 GJ.
When would I need to convert gigajoule to International Table BTU?
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).