To calculate the concrete yards needed for a driveway, first measure the length, width, and depth (thickness) of the area in feet. Use the formula: Volume (cubic feet) = Length (ft) × Width (ft) × Depth (ft). Then, convert cubic feet to cubic yards by dividing the total volume by 27 (since there are 27 cubic feet in a cubic yard). The final formula is: Concrete Yards = (Length × Width × Depth) / 27.
About 3 1/2 ". 432 x .375 = 162cf / 27 = 6 cu yards
The easiest way is use Rule 324 (Length in Feet X Width in Feet x Height in Inches) Divided by 324 = Cubic Yards of concrete. Example 4' x 20' x 4"=320 Divided by 324 = 0.9876 Cubic Yards. Or Rule 27 (Length in Feet x Width in Feet x Height in Feet) Divided by 27 = Cubic Yards of Concrete. Example 4' x 20' x 0.33333333'=26.6666664 Divide by 27 = 0.9876 Cubic Yards.
Oops . . . please repost your question and include the depth of the concrete. You have to have all 3 dimensions in order to calculate volume (Cubic Yards of concrete).
Multiply length by width by depth (in feet). Divide that number of square feet by 27 to get cubic yards and then allow for a little extra. (20 X 40 X .25 = 200 / 27 = 7.4 yards) The answer is spot on correct however with 30 years of concrete experience I would not recommend a 3 inch thick slab unless you have very light vehicles. Our normal pour for garage slabs or driveways is a 4 inch pour using 3000 psi concrete with air entraining. This will give you a slab that you can depend on for delivery vehicles and others that may use your drive.
You will need 0.56 cubic yards of concrete.
How thick? Gotta have thickness to calculate cubic yards.
4"x16'x32' = 2.370370... cubic yards
The formula I use is 15 tons = about 12 yards.
Crushed concrete is sold by the ton. One dumptruck will haul between 13 and 15 tons. Your driveway should take around 30 tons if covered 4" thick.
20 times 50 divided by three is 333 1/3
16 ft * 47 ft * 4 inches =16/3 yards * 47/3 yards * 4/36 yards = 9.3 yards approx.
About 3 1/2 ". 432 x .375 = 162cf / 27 = 6 cu yards
To calculate the amount of crushed concrete needed for a 300' x 12' driveway, first find the area in square feet: 300 x 12 = 3,600 square feet. If you plan to have a depth of 4 inches (which is standard), convert that depth to feet (4 inches = 1/3 foot). Multiply the area by the depth: 3,600 x (1/3) = 1,200 cubic feet. Since there are 27 cubic feet in a cubic yard, divide by 27: 1,200 ÷ 27 ≈ 44.44 cubic yards. Therefore, you would need approximately 45 cubic yards of crushed concrete.
Length in ft x Width in ft. x depth in ft. = Cubic feet, divide by 27 to get yards of concrete needed.
The easiest way is use Rule 324 (Length in Feet X Width in Feet x Height in Inches) Divided by 324 = Cubic Yards of concrete. Example 4' x 20' x 4"=320 Divided by 324 = 0.9876 Cubic Yards. Or Rule 27 (Length in Feet x Width in Feet x Height in Feet) Divided by 27 = Cubic Yards of Concrete. Example 4' x 20' x 0.33333333'=26.6666664 Divide by 27 = 0.9876 Cubic Yards.
To calculate the amount of concrete needed for a 900 square foot area, you first need to determine the thickness of the concrete slab. Once you have the thickness in inches, divide it by 36 to convert to yards. Then divide the total cubic yards by the number of cubic yards in a concrete truck to determine how many truckloads you need.
You will have to measure the length and width, in yards, and multiply. You can also measure it out in feet, multiply, and divide by nine. If you're pouring concrete, you need the cubic yards, not the square yards.