The result of your conversion between terawatthour and Btu appears here
To convert between Terawatthour and Btu you have to do the following:
First divide 3.6e+15 / 1055.0559 = 3412141479896.94189453
Then multiply the amount of Terawatthour you want to convert to Btu, use the chart below to guide you.
Symbol: TWh
No description
Symbol: Btu
No description