Aggregate Calculator

Convert an area and depth into tons of material, with density presets for crushed stone, sand, pea gravel, crushed concrete, decomposed granite, and river rock — or enter your supplier’s exact density.

Aggregate Material Details

Material Type

Length

Width

Depth

Density (auto-filled, editable)

tons/yd³

Compaction Allowance

Pick a material and enter your coverage area to see tons needed.

The formula

Tons = (Length ft × Width ft × Depth in ÷ 12) ÷ 27 × Density (tons/yd³)

Density is what turns volume into an order — suppliers sell by the ton. Typical values run from about 1.30 tons/yd³ for pea gravel up to 1.50 for decomposed granite. If your quarry quotes a density, use theirs; moisture and gradation shift the real number.

Compaction allowance

If the material will be compacted in place (a base course, DG pathway, or paver bed), add a compaction percentage so you order enough loose material to reach your target finished depth. Decorative loose cover doesn’t need it.

Frequently Asked Questions

How many tons of aggregate do I need per cubic yard?

It depends on the material: pea gravel ≈1.30, sand ≈1.35, crushed stone ≈1.40, crushed concrete ≈1.45, decomposed granite ≈1.50 tons per cubic yard.

How deep should decorative gravel be?

2–3 inches is typical for decorative coverage over fabric; 3–4 inches for areas with light foot traffic so the ground doesn’t show through.

Should I order aggregate by the ton or by the yard?

Most suppliers sell by the ton. Calculate volume from your area and depth, then convert with the material density — which is exactly what this calculator does.