How much soil or bark do you need?  

   Find out in 3 easy steps:                   

1.  First measure the size of the area to be covered to get your total square feet value.  Measure the length of the area in feet, and the width of the area in feet, then multiply them together. 
 
2.  Decide how deep the bark or soil needs to be.  This will give you the square feet per cubic yard value:

Depth

Square feet per cubic yard

1 inches 324
2 inches 162
3 inches 108
4 inches 81
5 inches 65
6 inches 54
1 foot 27
Bark is typically put down at a depth of 4". 
 
3.  The number of yards of soil or bark you need can now easily be determined by dividing your total square feet value by your square feet per cubic yard value. 
 
    total square feet / square feet per cubic yard = yards needed.

 

Example:

You have an area that is 10' wide by 30' long that you want to cover with bark 4" deep.

Your total square feet = 10' x 30' = 300 square feet.

At a 4" depth your square feet per cubic yard is 81.

The yards of bark you'll need is total square feet / square feet per cubic yard, or 300 / 81, which is about 3.7, so you would need 4 yards of bark.