The result of your conversion between Btu and gigajoule appears here
To convert between Btu and Gigajoule you have to do the following:
First divide 1055.0559 / 1.0e+09 = 0.00000106
Then multiply the amount of Btu you want to convert to Gigajoule, use the chart below to guide you.
Symbol: Btu
No description
Symbol: GJ
No description