The result of your conversion between gigajoule and terawatthour appears here
To convert between Gigajoule and Terawatthour you have to do the following:
First divide 1.0e+09 / 3.6e+15 = 0.00000028
Then multiply the amount of Gigajoule you want to convert to Terawatthour, use the chart below to guide you.
Symbol: GJ
No description
Symbol: TWh
No description