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Gravel Calculator

Gravel is sold either by volume (cubic yards or cubic metres) or by weight (tons or tonnes). This calculator gives you both. Enter the area and depth, then adjust the density to match the stone your supplier sells.

Enter your measurements

Measurements
ft
ft
in

Typical: 2–3 in for paths, 4–6 in for driveways and bases.

Material & assumptions
tons/yd³

Varies by stone type, size and moisture (roughly 1.2–1.7 tons/yd³). Ask your supplier for their figure.

%

Allowance for compaction, uneven ground and spreading loss. 5–15% is common.

Enter your measurements and press Calculate to see quantities, a material breakdown and an optional cost estimate.

How the calculation works

  • Volume = Area × Depth × (1 + Compaction %)
  • Weight = Volume × Density
  • Cubic yards = Cubic feet ÷ 27

Density links volume and weight. It varies with stone type, particle size and moisture, which is why the calculator lets you change it. A common planning figure is around 1.4 tons per cubic yard, but your supplier's figure is always better.

Assumptions used

  • Default density is 1.4 short tons per cubic yard (about 1.66 t/m³). This is a planning value only.
  • 1 US short ton = 2,000 lb = 907.18 kg. Metric results use tonnes (1,000 kg).

Example calculation

A 20 × 10 ft path covered 3 in deep, with 10% extra and a density of 1.4 tons/yd³.

  1. 1Area: 20 × 10 = 200 ft²
  2. 2Volume: 200 × (3 ÷ 12) = 50 ft³ = 1.85 yd³
  3. 3With 10% extra: 1.85 × 1.10 = 2.04 yd³
  4. 4Weight: 2.04 × 1.4 = 2.85 tons

Result: Order about 2 cubic yards, or roughly 3 tons, of gravel.

How to measure your project

  • Measure length and width at the widest points. For curved paths, measure the length along the centreline.
  • For irregular areas, split them into rectangles and use the "known total area" option.
  • Decide on the finished depth after compaction, then use the allowance to account for settling.

Frequently asked questions

How many tons of gravel are in a cubic yard?

Typically between about 1.2 and 1.7 tons, depending on the stone and how wet it is. Crushed stone and gravel are often estimated at around 1.4 tons per cubic yard, but ask your supplier.

How deep should gravel be?

Decorative gravel and paths are commonly 2–3 in deep. Driveways and parking areas need a thicker, layered build-up, often 8–12 in in total. See how deep a gravel driveway should be.

Should I order extra gravel?

Yes. Gravel compacts and spreads into soft ground, so 5–15% extra is common. It is usually cheaper to order a little extra than to pay a second delivery fee.

Related guides

  • Illustration of a crushed stone gravel driveway leading to a house
    Gravel

    How to Calculate Gravel for a Driveway

    Step-by-step guide to calculating driveway gravel in cubic yards and tons, including layers, compaction and converting volume to weight with real examples.

    2 min read
  • Cross-section illustration of base, middle and top stone layers in a gravel driveway
    Gravel

    How Deep Should a Gravel Driveway Be?

    Recommended gravel driveway depths for new builds, soft soils and resurfacing, with layer-by-layer guidance and the volume impact of each extra inch.

    2 min read

Results are estimates based on the measurements and assumptions you enter. Always confirm product specifications, local building codes and final quantities with your supplier or a qualified professional. See our disclaimer.