Length in feet x width in feet x depth in feet (inches divide by 12 to convert to feet) then divide by 27 to get cubic yardage. Approximate compaction factor 30% – multiply by 1.30 to get total yardage.
How Do You Figure Yards of Concrete?
Figuring out how many yards of concrete you need for a given project can seem daunting, but it doesn’t have to be. With a few simple calculations, you can determine the exact amount of concrete you need to complete your project. To figure out yards of concrete, you will need to know the volume of the space you are filling, the desired thickness of the concrete, and the specific weight of the material you are using.
First, you need to determine the volume of the space you are filling. This can be done by first measuring the length and width of the space, and then multiplying them together. This will give you the square footage of the area you are filling. Once you have the square footage, you can then calculate the cubic footage by multiplying the area by the thickness of the concrete you want to use.
The second step is to determine the specific weight of the material you are using. Generally, concrete is sold in pounds per cubic feet, so you need to divide the total weight of the concrete by the total cubic feet of the project. This will give you the weight of one cubic foot of concrete.
Once you have the weight of one cubic foot of concrete, you can then calculate the total number of yards of concrete