The result of your conversion between Btu and calorie [I.T.] appears here
To convert between Btu and Calorie [I.T.] you have to do the following:
First divide 1055.0559 / 4.1868 = 251.99577243
Then multiply the amount of Btu you want to convert to Calorie [I.T.], use the chart below to guide you.
Symbol: Btu
No description
Symbol: cal
No description