The result of your conversion between terawatthour and zettajoule appears here
To convert between Terawatthour and Zettajoule you have to do the following:
First divide 3.6e+15 / 1.0e+21 = 0.0000036
Then multiply the amount of Terawatthour you want to convert to Zettajoule, use the chart below to guide you.
Symbol: TWh
No description
Symbol: zJ
No description