Convert gigajoules to joules
1 GJ = 1000000000 J — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
1 000 000 000J
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1 GJ = 1000000000 J
Show this value in all 39 energy & work units
- Petajoules PJ 0.000 001
- Terajoules TJ 0.001
- Gigajoules GJ 1
- Megajoules MJ 1000
- Kilojoules kJ 1 000 000
- Joules J 1 000 000 000
- Millijoules mJ 1 000 000 000 000
- Microjoules µJ 1 000 000 000 000 000
- Nanojoules nJ 1e+18
- Watt-hours Wh 277 777.777 778
- Kilowatt-hours kWh 277.777 777 778
- Megawatt-hours MWh 0.277 777 777 778
- Gigawatt-hours GWh 0.000 277 777 777 778
- Terawatt-hours TWh 0.000 000 277 777 777 778
- Calorie (thermochemical)s cal 239 005 736.138
- Kilocalories kcal 239 005.736 138
- Calorie (IT)s cal (IT) 238 845 896.627
- Kilocalorie (IT)s kcal (IT) 238 845.896 627
- British thermal units BTU 947 817.120 313
- BTU (thermochemical)s BTU (th) 948 451.652 677
- Million BTUs MMBTU 0.947 817 120 313
- Therm (US)s thm 9.480 434 279 73
- Therm (EC)s thm (EC) 9.478 169 879 13
- Electronvolts eV 6.24150907446e+27
- Kiloelectronvolts keV 6.24150907446e+24
- Megaelectronvolts MeV 6.24150907446e+21
- Gigaelectronvolts GeV 6.24150907446e+18
- Teraelectronvolts TeV 6 241 509 074 460 000
- Ergs erg 1e+16
- Foot-pounds ft·lbf 737 562 149.277
- Inch-pounds in·lbf 8 850 745 791.33
- Foot-poundals ft·pdl 23 730 360 404.2
- Horsepower-hours hp·h 372.506 135 999
- Tonne of TNTs t TNT 0.239 005 736 138
- Kiloton of TNTs kt TNT 0.000 239 005 736 138
- Megaton of TNTs Mt TNT 0.000 000 239 005 736 138
- Hartrees Eₕ 2.2937122784e+26
- Rydbergs Ry 4.58742455679e+26
- Quads quad 9.47817120313e-10
Every row is Gigajoule (GJ) converted through the joule, in exact rational arithmetic.
How to convert gigajoules to joules
Multiply the number of gigajoules by 1000000000 to get joules.
The exact factor is 1000000000 .
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 |
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 |
Frequently asked
How many joules are in a gigajoule?
One gigajoule equals 1000000000 joules (GJ → J). That figure is exact, not rounded.
How do you convert gigajoules to joules?
Multiply the number of gigajoules by 1000000000 to get joules.
What is 1 J in gigajoules?
One joule is 1e-9 gigajoules.
What is 10 GJ in J?
10 GJ = 10 000 000 000 J.