6.02 cubic yards. Order 6-1/2 if they'll let you to be safe. SF x depth / 27 = cubic yards. 650 x .25 (3" is .25 of 1 ft) / 27 = 6.02 cy.
40.1 cubic yards
39.1116 cubic yards
One square yard is nine square feet, so 27 square feet is equivalent to 3 square yards. So 3 yards of concrete will cover 27 square feet.
It should be a little over 19 yards.
2.2222222201902215 cubic yards
1000 square feet/9 = 111.1 square yards of concrete 6 inches thick. This is the same as 111.1/4.5 = 24.7 cubic yards of concrete.
40.1 cubic yards
2.2 Yards
1.77 cubic yards
39.1116 cubic yards
One square yard is nine square feet, so 27 square feet is equivalent to 3 square yards. So 3 yards of concrete will cover 27 square feet.
For 576 square feet at a depth of 4 inches, you will need 7.11 cubic yards.
At a poured depth of 4 inches, you will need 4.94 cubic yards.
16.05
It should be a little over 19 yards.
If you multiply inches times inches, you get square inches. You can convert that to square yards, but not to yards.
To my knowledge, concrete is measured in cubic yards. you would convert your measurements to yards 2000 sq ft is about 222.22 sq yards 4 inches is about 0.11 yards multiply to get volume, about 24.7 cu yards