Convert gigajoules to watt-hours
1 GJ = 277777.777778 Wh — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
277 777.777 778Wh
As a fraction: 2500000/9
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1 GJ = 277777.777778 Wh
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 watt-hours
Multiply the number of gigajoules by 277777.777778 to get watt-hours.
Gigajoule to Watt-hour conversion table
| Gigajoules (GJ) | Watt-hours (Wh) |
|---|---|
| 1 GJ | 277 777.78 |
| 2 GJ | 555 555.56 |
| 3 GJ | 833 333.33 |
| 5 GJ | 1 388 888.9 |
| 10 GJ | 2 777 777.8 |
| 20 GJ | 5 555 555.6 |
| 25 GJ | 6 944 444.4 |
| 50 GJ | 13 888 889 |
| 100 GJ | 27 777 778 |
| 250 GJ | 69 444 444 |
| 500 GJ | 138 888 890 |
| 1000 GJ | 277 777 780 |
Watt-hour to Gigajoule conversion table
| Watt-hours (Wh) | Gigajoules (GJ) |
|---|---|
| 1 Wh | 0.000 003 6 |
| 2 Wh | 0.000 007 2 |
| 3 Wh | 0.000 010 8 |
| 5 Wh | 0.000 018 |
| 10 Wh | 0.000 036 |
| 20 Wh | 0.000 072 |
| 25 Wh | 0.000 09 |
| 50 Wh | 0.000 18 |
| 100 Wh | 0.000 36 |
| 250 Wh | 0.0009 |
| 500 Wh | 0.0018 |
| 1000 Wh | 0.0036 |
Frequently asked
How many watt-hours are in a gigajoule?
One gigajoule equals 277777.7778 watt-hours (GJ → Wh). That figure is exact, not rounded.
How do you convert gigajoules to watt-hours?
Multiply the number of gigajoules by 277777.777778 to get watt-hours.
What is 1 Wh in gigajoules?
One watt-hour is 0.0000036 gigajoules.
What is 10 GJ in Wh?
10 GJ = 2 777 777.8 Wh.