It is at times desireable to know the internal volume of a radiator in order to calculate gallons, or cubic feet of air. The chart list pints and cubic inches. There are 8 pints to a gallon. There are 231 cubic inches to a gallon. There are 1728 cubic inches to a cubic foot. This chart is reprinted with permission from the 1935 Hoffman Data Book and is courtesy of ITT. Click the link for a larger image in adobe acrobat.