Construction · Free calculator

Gravel Calculator

Calculate gravel needed in cubic yards and tons from area and depth, plus delivered cost including compaction allowance.

Short answer

Gravel Calculator

10Gravel needed (tons)

Delivered cost is about $401. Crushed stone runs roughly 1.4 tons per cubic yard, and the 15% compaction allowance is included — order short and you'll pay a second delivery fee that often exceeds the material.

How it's calculated: 480 sq ft at 4 in deep = 6.81 yd³ / 9.54 tons. Adjust the inputs below to recalculate for your own numbers.

Disclaimer: Estimates only — not a bid. Real construction costs swing with local labor rates, permits, soil and site conditions, material markets, and design choices. Get at least three written quotes from licensed contractors before budgeting.

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40
12
4
$42.00
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Formula used

Tons = area × depth ÷ 27 × 1.15 × 1.4

Suppliers sell gravel by the ton or by the yard depending on region. Crushed stone averages 1.35–1.45 tons per cubic yard; pea gravel is slightly lighter and river rock slightly heavier.

yd³ = (L × W × D/12) ÷ 27; tons ≈ yd³ × 1.4
Weight per yd³
~1.4 tons
Delivered price
$30–60/ton
Driveway depth
4–6 in
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Choosing the right gravel

Crusher run (with fines) compacts into a solid base and is right under patios and driveways. Clean washed stone drains freely and belongs behind retaining walls and in French drains, but it never locks up under traffic.

  • Compact in 2–3 in lifts for anything load-bearing.
  • Geotextile fabric under the base prevents gravel from sinking into soft soil.
  • Full truckloads (about 15–20 tons) cost far less per ton than partials.

FAQ

How much gravel do I need for a driveway?

A 40×12 ft driveway at 4 inches deep needs about 2.1 cubic yards loose, or roughly 3.4 tons ordered with compaction allowance.

How many tons is a cubic yard of gravel?

About 1.4 tons for typical crushed stone. Pea gravel is closer to 1.3 tons and wet material weighs more.

How deep should gravel be?

4 inches for light foot and car traffic, 6–8 inches for regular vehicle use, and 8–12 inches for trucks or soft soil.

How this calculator is built

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Written by Sam Doshi and the RevenueLab editorial team. We don't sell the data feeds this tool is built on.

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See our editorial policy and disclaimer. Results are estimates, not advice.

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