For 2 feet deep, you need 230 cu. yds (3100 x 2) / (27) For 2 inches deep, you need 19 cu yds
40.1 cubic yards
3880 cubic yards
1.19 Cubic Yards
2.37 cubic yards of dirt is needed to fill an 8'X4' that is 24" deep garden box. If the box is filled 12 inches, the amount of soil needed is 1.19 cubic yards and that should be deep enough for most vegetables.
100' x 1"= 100 sq ft. x 4" deep= 33.3 CUBIC feet. That is about 1.24 cubic yards.
3100 x 5/12 = 1292 cubic feet Since one yard = 27 cu ft, you need about 1292/27 = 48 yards
You already have a square yard of topsoil, so how does 20 inches of depth get you the volume of topsoil? There are 36 inches in a yard, and you have 20 inches of topsoil depth that's 20/36ths of a yard of topsoil depth. That's 0.555... or about 0.56 yards. The volume of topsoil is 1 yard by 1 yard by 0.56 yards, or about 0.56 cubic yards of topsoil.
You would need 31.88 cubic yards of topsoil to cover 855 sq feet at 6 inches deep.
14.8 yards
if that is 3 ft deep it would require 96 yards... IF it is 3 inches deep it would require 24 cubic yards
It takes 5.0926 cubic yards or 137.5 cubic feet.
40.1 cubic yards
To determine the amount of topsoil needed for one acre at a depth of 4 inches, first convert the depth from inches to feet: 4 inches is 1/3 of a foot. There are 43,560 square feet in an acre, so the volume in cubic feet is 43,560 sq ft * (1/3 ft) = 14,520 cubic feet. Since there are 27 cubic feet in a cubic yard, divide by 27 to find the volume in cubic yards: 14,520 / 27 ≈ 538.89 cubic yards. Therefore, you will need approximately 539 cubic yards of topsoil.
3880 cubic yards
You'll need about 28.704 cubic yards (37 tons) of gravel.
1.19 Cubic Yards
123.44 cubic yards