People often try to look like they know what they are doing even when they don't. Even if you are mathematically challenged, here is an easy formula to figure how much mulch or landscape soil mix you will need for your bed. First, it is critical to know there are 27 cubic feet in a cubic yard. One cubic yard will cover a 324 square foot area with one inch of soil or mulch. It is the base times height, divided by two.
Circular beds are popular in the South.
To find out the square feet, go to the middle of the circle and measure to the outside. This is your radius. Multiply this number by itself. For example, if the distance was six, multiply by six to get 36. This will determine your area in square feet.