How many yards of concrete for a 40x40x4?

Answer 1

To calculate the amount of concrete needed for a slab that is 40 feet long, 40 feet wide, and 4 inches thick, first convert the thickness to feet: 4 inches is 1/3 foot. Then, multiply the dimensions: 40 ft × 40 ft × (1/3 ft) = 533.33 cubic feet. To convert cubic feet to cubic yards, divide by 27 (since there are 27 cubic feet in a cubic yard): 533.33 ÷ 27 ≈ 19.7 cubic yards. Therefore, you will need approximately 19.7 cubic yards of concrete.