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Gravel Calculator

Work out the gravel needed for a driveway, path or base layer — by volume, by weight and by the tonne you order in.

Computed in your browser — nothing you enter is uploaded. Figures are presented for United States against IRC 2024, and every formula is cited under regulatory standards below.

Last verified 2026-08-26 · v1.0.0

Market
Imperial · sales tax
32.81 ft9.84 ft0.33 ft
Schematic, drawn to the proportions you entered — not to scale on screen.

Gravel required

5.76 metric tonnes

Check your inputs

Uses a typical crushed-stone density of 1600 kg/m³. Ask your supplier for the density of the specific grade — a dense basalt and a light limestone differ by 15%.

Finished volume
3.92 yd³
Loose volume to order
4.71 yd³
Cubic yards
4.71 yd³
US short tons
6.35 tons

At the values currently entered, the gravel required works out to 5.76 metric tonnes. Note that length and width sit at the edge of the range this calculator was checked against, so treat the output as indicative rather than settled. Confidence is moderate: the method is sound, but real materials and site conditions vary. Figures are shown for United States, where IRC 2024 is the governing residential reference; switch the market above if you are building elsewhere.

Add the equipment this sizes

This result is a specification — 5.76 metric tonnes — not a quantity. Put the thing it sizes into your project: how many, what you call it, and your supplier’s price.

Preliminary estimate, not certified engineering. This tool produces an indicative quantity calculation for planning purposes only — it is not a certified structural analysis, a guaranteed material takeoff, or a substitute for building department approval. Always verify measurements on-site and have a licensed contractor or structural engineer review any load-bearing, code-sensitive, or safety-critical work before purchasing materials or starting construction. Spotted an arithmetic or standards error? Report it to contact@craftquantities.com with your inputs — confirmed fixes become pinned regression tests.

[Schema Verified] Computed in alignment with American Concrete Institute (ACI 318-19) formulas and International Residential Code (IRC 2024) spatial boundaries.

Regulatory standards & verification citations

  • Typical compacted crushed-stone bulk density 1600 kg/m³ (100 lb/ft³) — state DOT aggregate specifications
  • Driveway base depth 100-150 mm (4-6 in) over a prepared subgrade — common residential practice

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Most jobs need more than one number. Add the calculators you need next and they open right here, underneath this one — your figures stay on screen and nothing is lost to a page change.

Still deciding? Gravel vs Asphalt Driveway — the factors that actually differ, with no invented prices.

Frequently asked questions

How deep should a gravel driveway be?
100 mm (4 in) of compacted stone suits light use on firm ground; 150 mm (6 in) is the usual figure for a car driveway. On soft or clay subgrade you need more, plus a geotextile separator — without one the stone works down into the clay and the drive fails from below.
Why order more than the finished volume?
Because gravel is sold loose and used compacted. Crushed stone loses 15-25% of its loose volume when rolled, so ordering the finished figure leaves you short by that much. The allowance here covers it.
Tonnes or cubic yards?
Whichever your supplier quotes. Both are shown. Weight is the more reliable of the two because it does not depend on how loosely the material was loaded — a cubic yard tipped from a height is not the same cubic yard as one settled in a bin.
Does the type of gravel change the quantity?
The volume, no; the weight, yes. Density varies with the parent rock and the grading, so the same volume of a dense basalt weighs about 15% more than a light limestone. If you are ordering by weight, ask for the density of the grade you are buying.