The result of your conversion between petawatthour and gigajoule appears here
To convert between Petawatthour and Gigajoule you have to do the following:
First divide 3.6e+18 / 1.0e+09 = 3600000000.
Then multiply the amount of Petawatthour you want to convert to Gigajoule, use the chart below to guide you.
Symbol: PWh
No description
Symbol: GJ
No description