## 2020 Crushed Stone Calculator: 3/4 inch rock - HomeAdvisor

Sixty-four feet multiplied by 3.14 equals about 201 square feet. Using the 20 percent method, we would multiply 16 by 16 to reach 256. Then calculate 80 percent of that by multiplying 256 by .8. That total is 204.8, rounded to 205. A four-square-foot difference of crushed gravel isn't going to affect your price or your project significantly ...