The result of your conversion between petawatthour and Btu appears here
To convert between Petawatthour and Btu you have to do the following:
First divide 3.6e+18 / 1055.0559 = 3412141479896941.5
Then multiply the amount of Petawatthour you want to convert to Btu, use the chart below to guide you.
Symbol: PWh
No description
Symbol: Btu
No description