How To Calculate Volume Of Landscape Rock Needed?


Divide the desired depth for your landscape rock in inches by 12 to convert it to feet. For instance, if you want the rock to be 2 inches deep, divide 2 by 12, which equals 0.1667 feet. Multiply the length by the width by the desired depth in feet for your landscape rock to find the number of cubic feet you will need.


Divide the number of cubic feet by 27 to determine the number of cubic yards you need for your landscape rock; there are 27 cubic feet in each cubic yard. In the example, 3.4729/27 = 0.1286 cubic yards. Things You Will Need

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cubic yard formula

Frequently Asked Questions

How do you calculate cubic yards of rock?

How to calculate cubic yards? The formula: Number of Cubic Yards = Length (in feet) Width (in feet) Depth (in feet) ÷ 27. Simply multiply the three dimensions together to find the number of cubic feet, then divide by 27 to find the number of cubic yards.

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