Gallon-atmosphere (US) to inch-pounds force conversion calculator shown above calculates how many inch-pounds force are in 'X' gallon-atmosphere (US) (where 'X' is the number of gallon-atmosphere (US) to convert to inch-pounds force). In order to convert a value from gallon-atmosphere (US) to inch-pounds force (from gal atm to in lbf) simply type the number of gal atm to be converted to in lbf and then click on the 'convert' button.