Question: one brass is equal to how many square feet?
Answer: It equals one hundred cubic feet volume, (e.g. a cart with load bed of 8' x 5' size, when loaded with sand which levels 2.5' high, the quantity is (8 x 5 x 2.5 / 100 =) 1 brass. It is also used as a measure of surface area of 100 square feet, as used by painters, masons, etc, for quoting or billing purposes.