Gravel & Aggregate Calculator
Enter your area, depth, and stone type to get cubic yards and tons — tonnage depends on density, so the stone type matters.
How much gravel do I need?
Gravel is sold by the ton; tonnage depends on the stone's density, so pick the type (default ~1.4 tons/yd³). A 10% waste allowance covers compaction and uneven ground; driveway surface is usually ~4 in. Cost is an estimate (as of June 2026) — delivery is typically extra.
📘 New here? Read How much gravel for a driveway?
How the gravel estimate works
- Volume = area × depth ÷ 324 = cubic yards (same 324 identity as mulch).
- Tons = cubic yards × the stone's density. Crushed stone runs about 1.4 tons per cubic yard; crusher run is heavier (~1.6), large rock lighter (~1.25).
- 100 ft² at 4″ = 1.23 yd³ × 1.4 ≈ 1.7 tons, then add ~10% for compaction.
Gravel is sold by the ton, so we round up to the half-ton. Density varies by stone type, gradation, and moisture — pick the closest match.
Last updated: 2026-06-28.
Densities per Inch Calculator and aggregate-supplier tables. Cost is a US-average estimate; delivery is extra.