### 2020 crushed stone calculator: 3/4 inch rock - homeadvisor

Jul 20, 2020 · First, calculate the area in square feet of your project. As an example, a 10-foot wide, 20-foot long driveway is a 200-square foot area. Then, multiply the area by the depth. For instance, if you are using four inches of crushed stone under a patio area or for a …