How Much Crushed Stone Do You Need? A Sure .
If your patio is 20 feet long and 10 feet wide, and you need 6 inches of crushed stone for the base, you would plug those numbers into formula, like this: (20''x10'''') / 27 = cubic yards When using this equation, make sure all of your measurements are in feet. Since we needed 6 inches of crushed stone, we used feet for the height (that is, we converted inches into feet). If your ...