The result of your conversion between Btu [thermochemical] and zettajoule appears here
To convert between Btu [thermochemical] and Zettajoule you have to do the following:
First divide 1054.3503 / 1.0e+21 = 0.
Then multiply the amount of Btu [thermochemical] you want to convert to Zettajoule, use the chart below to guide you.
Symbol: Btu
No description
Symbol: zJ
No description