Gravel Calculator

For a standard driveway, you need 4-6 inches of gravel depth. A typical single-car driveway (10ft x 20ft) requires about 2.5-3.7 cubic yards or 3.5-5.2 tons of gravel. For a two-car driveway (20ft x 20ft), plan for 5-7.5 cubic yards or 7-10.5 tons. Use crushed stone or base material for the best durability and compaction.

Most gravel types weigh between 1.35 to 1.5 tons per cubic yard. Pea gravel and crushed stone average 1.4 tons per cubic yard, river rock averages 1.35 tons, and compacted base material can weigh up to 1.5 tons per cubic yard. The exact weight depends on moisture content, particle size, and compaction.

For a patio base, use 3/4-inch crushed stone or gravel base material (also called crusher run or road base). Apply a 4-6 inch layer, compact it thoroughly, then add 1 inch of sand or stone dust before laying pavers. The angular edges of crushed stone lock together better than rounded river rock, creating a more stable base.

For irregular shapes, divide the area into rectangles or triangles, calculate each section separately, and add them together. Alternatively, estimate the total square footage by measuring the longest length and width, then multiply by 0.8-0.9 to account for irregular edges. Our calculator includes an irregular shape option where you can enter your estimated square footage directly.

Yes, gravel should be compacted for driveways, paths, and patio bases. Crushed stone typically compacts by 10-15%, while round gravel like pea gravel compacts less (5-10%). Order 10-15% extra material to account for compaction. Use a plate compactor or hand tamper, working in 2-3 inch layers and wetting the material for best results.

For drainage applications, use clean 3/4-inch to 1.5-inch washed gravel or river rock without fines. The absence of small particles allows water to flow freely. For French drains, 3/4-inch clean gravel is standard. Avoid crushed stone with fines (crusher run) as the fine particles can clog and reduce drainage capacity over time.