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).
You will need 0.56 cubic yards of concrete.
You will need 17.8 cubic yards of concrete.
1.67 cubic yards.
0.89 cubic yards.
How thick? Gotta have thickness to calculate cubic yards.
The formula I use is 15 tons = about 12 yards.
Length in ft x Width in ft. x depth in ft. = Cubic feet, divide by 27 to get yards of concrete needed.
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.
The term "yards" of concrete means 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).
To calculate the amount of concrete needed for a project, you need to determine the volume of the area to be filled with concrete. This can be done by multiplying the length, width, and height of the area. Once you have the volume, you can then calculate the amount of concrete needed by dividing the volume by the coverage area of one cubic yard of concrete. This will give you the total number of cubic yards of concrete needed for the project.
Formula: m2 x 1.196 = yards2
You need to supply the thickness of the slab in order to calculate this. If it was a 6" inch thick slab (0.5 feet), then the formula would be 2 x 76 x 0.5, all divided by 27 = 2.81 cubic yards.
Length x width x thickness or depth. Starting with inches, you will come up with total cubic inches using that formula. Divide that number by 1728 to get cubic feet. divide that quotient by 27 to get cubic yards. Concrete is usually sold by cubic yard.
You will need 0.56 cubic yards of concrete.