How cubic inches in a cubic foot?

1728 cubic inches. 1' = 12" AND 1 cubic foot = 1'x1'x1' SO 1 cubic foot = 12"x12"x12" which also equals 1728. Since you are looking for inches, first convert your measurements to inches. Your area is 1 foot high x 1 foot wide x 1 foot deep or 12 inches high x 12 inches wide x 12 inches deep. 12 inches (H) x 12 inches (W) is (12 x 12 = 144) (in X in = in2) or 144 square inches. 144 in2 x 12 in deep is (144 x 12 = 1728) (in2 x in = in3) or 1728 cubed (cubic) inches.