Inch-pounds force to British thermal units (IT) conversion calculator shown above calculates how many British thermal units (IT) are in 'X' inch-pounds force (where 'X' is the number of inch-pounds force to convert to British thermal units (IT)). In order to convert a value from inch-pounds force to British thermal units (IT) (from in lbf to BTU) type the number of in lbf to be converted to BTU and then click on the 'convert' button.