Answer:
Picture in your mind a cube that measures one foot -- that is, one linear foot -- on each edge. That represents a volume equal to one cubic foot. Since one linear foot equals 12 (linear) inches, the cube measures 12 inches wide by 12 inches deep by 12 inches high. To compute the volume in cubic inches, multiply the length, width, and height. So, 12" x 12" x 12" equals 1,728 inches cubed or 1,728 cubic inches.