i don't believe so....
it's not that hard though; internal dimensions multiplied by each other divided by 1728
so if you have a box that externally is 13.5"tallx13.5" wide x 13.5" deep, it would have internal dimensions of 12x12x12.
multiply 12x12x12 you get 1728. divide by 1728, you get 1 cubic foot, or 1728 cubic inches.