90 square feet
1 acre = 4,840 square yards = 4,840 x 9 square feet = 43,560 square feet. 1 square foot 1 inch thick equals 1/12 of a cubic foot, so 43,560 square feet 1 inch thick equal 1/12 x 43,560= 3,630 cubic feet.
80
144
Gypsum or plaster board3 3/8 inch 1.56 pounds per square foot 1/2 inch 2.08 pounds per square foot 5/8 inch 2.60 pounds per square foot
3X.5 = 1.5 Sq Feet
1 yard topsoil covers 100 square feet to 3 inches, 200 square feet to 1.5 inches and 300 square feet to 1 inch.
2.78 square feet.
A square foot will cover a square foot, regardless of the depth of the material the cover is made of.
53.3
2.77 square feet.
It depends how thin the cubic feet are. If they are 1 foot thick: 21,000 cubic feet. If they are 3 feet thick: 63,000 cubic feet will cover 21,000 square feet.
230 * 1/12 = 19.166.. cubic feet = 542.74 litres