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 25% – multiply by 1.25 to get total yardage.
How to Figure Yards of Concrete for a Slab?
Figuring out how many yards of concrete you need for a slab is a critical part of any construction project. The amount of concrete you need for a slab depends on the size and shape of the area you’re pouring the slab on. In order to have a successful project, you need to have an accurate estimate of the amount of concrete needed.
The first step in estimating how many yards of concrete you need for a slab is to measure the area of the slab. You can measure the length and width of the slab in feet and multiply them together to get the area of the slab. For example, if you had a slab that was 10 feet long and 10 feet wide, then the area of the slab would be 100 square feet.
Once you know the area of the slab, you can calculate the amount of concrete you need. Generally, a cubic yard of concrete will cover an area of 108 square feet, so you can divide the area of the slab by 108 to get the number of cubic yards needed. For example, if you have a slab that is 100 square feet, then you need .93 cubic yards of concrete.
In addition to the area of the slab, you also need to factor in the