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Gravel Driveway Calculator

Estimate the tons of crushed stone needed for a gravel driveway, based on area and depth.

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 2026-08-25 · v1.0.0

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

Estimated gravel driveway needed

6.7 tons

High confidence
Driveway area
387.5 sq ft
Volume
4.78 cubic yards

At the values currently entered, the result works out to 6.70 tons. Figures are shown for United States, where IRC 2024 is the governing residential reference; switch the market above if you are building elsewhere.

Estimated cost — your price

This site holds no price list for this material — local prices vary too much to publish honestly. Enter your supplier's price and the result is costed with it.

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

  • Crushed stone/gravel is sold by weight; a commonly-cited average density is about 1.4 tons per cubic yard for compacted material
  • A 4-6 in gravel depth is standard for a residential driveway base or wearing surface

Your workspace

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.

Frequently asked questions

Why is a gravel driveway built in three different stone layers instead of one thick lift of the same material?
Each layer does a different structural job: large angular base stone (typically 50-75 mm clean or crusher run) bridges soft subgrade and spreads wheel loads; a mid layer of 20-25 mm compacts into the voids and locks the base; and the top course of 10-20 mm crushed fines gives the tight running surface that sheds water. Skipping straight to surface gravel on soil is the classic failure — the stone migrates down and mud pumps up within a season or two.
Does gravel density really vary that much?
Yes — density depends on the stone type and how compacted it is. This uses a widely-cited average; ask your supplier for their specific material's density for a more precise order.
Do I need a fabric weed barrier under the gravel?
Many installers recommend a geotextile fabric layer to prevent gravel from sinking into the subsoil over time and to reduce weed growth — a separate material from the gravel itself.
How often does a gravel driveway need more material added?
Gravel driveways typically need topping up every few years as material displaces and compacts — this calculator is for the initial installation.