The result of your conversion between Btu and pound/cubic foot appears here
To convert between Btu and Pound/cubic Foot you have to do the following:
First divide 1055.0559 / 0.45359237/((0.0037854118/231)*1728) = 65.86498841
Then multiply the amount of Btu you want to convert to Pound/cubic Foot, use the chart below to guide you.
Symbol: Btu
No description
Symbol: lb/ft³
No description