The result of your conversion between petawatthour and zettajoule appears here
To convert between Petawatthour and Zettajoule you have to do the following:
First divide 3.6e+18 / 1.0e+21 = 0.0036
Then multiply the amount of Petawatthour you want to convert to Zettajoule, use the chart below to guide you.
Symbol: PWh
No description
Symbol: zJ
No description