Estimate rock volume, cubic yards, cubic feet, tons, and bag counts for decorative stone, landscape beds, drainage areas, pathways, and other rock projects.
Volume formula:
Length × width × depth = total rock volume
Weight formula:
Volume × density = total rock weight
This calculator estimates rock volume, cubic yards, cubic feet, tons, and approximate bag count.
Knowing how much rock you need helps when planning decorative beds, drainage areas, and landscape projects so you can order enough material without overspending.
Accurate rock depth helps with appearance, weed suppression, drainage, and coverage.
Your result shows the estimated rock volume based on the area dimensions, depth, and density entered. It also includes cubic yards, total weight, and an approximate number of bags based on the bag size selected.
Actual needs can vary depending on rock shape, settling, and how evenly the material is spread. For larger projects, ordering bulk rock by the yard or ton is usually more practical than bags.
Multiply the area length by width and depth to find total volume, then apply density to estimate the total weight.
Both are common. Suppliers often sell landscape rock by the ton or cubic yard, so it helps to know both measurements.
Many decorative areas use around 2 to 3 inches, while drainage or heavier coverage projects may need more depth.
Small projects are often easier with bags, while larger projects are usually more cost-effective with bulk rock.