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Concrete Formula For Cubic Yards

How to calculate concrete for cylinders and sonotubes instead of using a concrete calculator to figure your cubic yardage, you can do the math yourself with this formula pi x r2 x h this will give you the volume in cubic inches which well convert to cubic feet then to cubic yardsi 3 r2 radius squared or radius x radius radius is 12 the diameter h height in inches heres.