The result of your conversion between femtojoule and Btu appears here
To convert between Femtojoule and Btu you have to do the following:
First divide 1.0e-15 / 1055.0559 = 0.
Then multiply the amount of Femtojoule you want to convert to Btu, use the chart below to guide you.
Symbol: fJ
No description
Symbol: Btu
No description