How Much Gravel Do I Need? Calculator and Coverage Guide
Gravel coverage depends on depth and area. Here is the formula and a ready-to-use chart.
Formula: Length (ft) x Width (ft) x Depth (inches) / 12 = cubic feet. Divide by 27 for cubic yards. One cubic yard of gravel weighs approximately 2,700 pounds (1.35 tons) and covers about 100 square feet at 3 inches deep. A 10x20 foot area at 3 inches deep needs about 2.2 cubic yards or roughly 3 tons.
Common Gravel Types
Pea gravel: smooth, round, good for walkways. $25-50 per cubic yard. Crushed stone: angular, compacts well, good for driveways. $20-40 per cubic yard. River rock: decorative, larger stones. $40-80 per cubic yard. Decomposed granite: fine, compacts to a firm surface. $25-50 per cubic yard.