


How Much Gravel Do I Need for a Shed Foundation? - Site ...
To determine the amount of gravel you will need for your shed foundation first calculate the square footage. In the example diagram shown, a 12×14 shed foundation, the square footage is 168. Next, multiply the square footage by the depth of gravel. If we use 6" of gravel, or 0.5 feet, our cubic footage is calculated as 168 x 0.5 = 84 cubic feet.
