The result of your conversion between Btu [thermochemical] and petawatthour appears here
To convert between Btu [thermochemical] and Petawatthour you have to do the following:
First divide 1054.3503 / 3.6e+18 = 0.
Then multiply the amount of Btu [thermochemical] you want to convert to Petawatthour, use the chart below to guide you.
Symbol: Btu
No description
Symbol: PWh
No description