The result of your conversion between Btu and pound/cubic mile appears here
To convert between Btu and Pound/cubic Mile you have to do the following:
First divide 1055.0559 / 0.45359237/(((0.0037854118/231)*1728*27)*5451776000) = 9695191402341.48046875
Then multiply the amount of Btu you want to convert to Pound/cubic Mile, use the chart below to guide you.
Symbol: Btu
No description
Symbol: lb/mi³
No description