### How to Calculate How Much Soil Is Needed in a Raised Bed ...

How to Calculate How Much Soil Is Needed in a Raised Bed Planter Box. Let''s assume the width of your box is 48 inches and the length of your box is 96 inches and the depth of your soil is going to be 10 inches. On your calculator multiply 48 X 96 to get 4,608. Now simply multiply 4,608 by 10 for a final total of 46,080. Write that number down.