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Gravel · Coverage Guide

Gravel coverage guide

A ton of gravel covers 114 ft² at 2 inches — until compaction, a wavy subgrade and edge waste take their cut. Here are the honest coverage numbers, per ton and per yard, at every practical depth.

What a ton of gravel covers

A US ton (2,000 lb) of common gravel at 105 lb/ft³ loose is about 19 cubic feet of stone. Spread thinner, it goes further — coverage scales inversely with depth, so halving the depth doubles the footage. The table gives the straight geometric numbers; the popular “100 ft² per ton at 2 inches” rule of thumb is simply the 2-inch row with a built-in settling margin.

Coverage per US ton of common gravel (105 lb/ft³ loose). Divide your area by the coverage figure to get tons.
DepthCoverage per tonWhere that depth belongs
1 inch≈ 229 ft²Refresh top-ups onlyToo thin for new cover — the fabric shows
2 inches≈ 114 ft²Decorative cover over fabricRule of thumb: 100 ft² after allowance
3 inches≈ 76 ft²Paths, patios, pet areas
4 inches≈ 57 ft²One compacted driveway lift
5 inches≈ 46 ft²Heavy-traffic single lift
6 inches≈ 38 ft²Base course, drainage beds

These figures assume common gravel. Lighter and heavier types shift them — the density chart has the unit weight for every type, and the last section below shows what that does to coverage.

What a cubic yard covers

Per-yard coverage is friendlier than per-ton coverage because it ignores density entirely: a cubic yard is 27 ft³ of any material, so the same table works for pea gravel, crusher run and river rock alike. That makes yards the safer unit when you are still choosing the gravel type.

Coverage per loose cubic yard — identical for every gravel type, since a yard is a volume, not a weight.
DepthCoverage per cubic yardNote
1 inch324 ft²27 ft³ ÷ (1/12 ft)
2 inches162 ft²≈ 1.42 tons of common gravel
3 inches108 ft²The all-purpose landscaping depth
4 inches81 ft²One driveway lift
5 inches65 ft²
6 inches54 ft²Two 3-inch lifts compact better than one 6-inch

Worked example: sizing a parking pad

Worked example

A 20 × 24 ft gravel parking pad topped with 3 inches of common gravel over an existing compacted base.

  1. 1

    Area

    20 × 24 = 480 ft²

  2. 2

    Tons from the coverage table

    480 ÷ 76 ft²/ton = 6.3 tons

  3. 3

    Cross-check in yards

    480 × 0.25 ft = 120 ft³ ÷ 27 = 4.4 yd³ (× 1.42 = 6.3 tons ✓)

  4. 4

    Add 10% for settling and edges

    6.3 × 1.10 = 6.9 tons

Result: Order 7 tons (about 5 loose cubic yards). The two routes to 6.3 tons agreeing is your arithmetic check.

Coverage questions

What shrinks real-world coverage

Charts describe gravel resting loose on a perfectly flat plane. Real sites take three predictable bites out of that number, and experienced estimators price them in rather than hoping they won't happen.

Irregular subgrade is the second thief. A subgrade that undulates by an inch means your “3-inch” layer is really 2–4 inches — and the low spots must be filled to reach the target surface, consuming stone the flat-plane math never counted. Grading before delivery is cheaper than the extra tonnage it saves. Waste takes the last cut: spillage at the edges, stone trodden into soft ground during spreading, and the material that never quite leaves the truck bed. The standard remedy for all three is a 10% allowance, raised to 15% for compacted crusher run or rough ground — the same allowance built into the five-step calculation method.

Coverage by gravel type

Coverage per ton at 2 inches deep, by type

The spread is worth money: a ton of pea gravel covers 45% more area than a ton of compacted crusher run at the same depth. When comparing per-ton quotes across types, convert to cost per covered square foot — the weight chart has the per-yard weights that make the conversion quick.

Get tons and yards for your exact dimensions

Keep estimating

Sources & references

  1. [1]ASTM C29/C29M: Bulk Density (Unit Weight) and Voids in Aggregate ASTM International, 2017
  2. [2]Gravel Roads Construction & Maintenance Guide FHWA / South Dakota LTAP, 2015
  3. [3]The Aggregates Handbook, 2nd ed. National Stone, Sand & Gravel Association, 2013