Cubic Yard Calculations

Square or Rectangle

length (in feet) x width (in feet)
x depth (in inches) / 324
= cubic yards.

Circle

Pi r² (radius in feet)
x depth (in inches) / 324
= cubic yards.

Or

3.1416 x radius x radius (both in feet) x depth (in inches) / 324
= cubic yards.

Triangle

base x height (both in feet) / 2
x depth (in inches) / 324
= cubic yards.

Oval

length x width (both at midpoint in feet)
x .8 x depth (in inches) / 324 = cubic yards.

1 cubic yard = 27 cubic feet.

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