How Much Does a Ton of Gravel Cover? Depth Chart
How much does a ton of gravel cover? The honest answer is “it depends on how deep you spread it,” but the math is short. Gravel is sold by weight and spread by volume, so you convert tons to cubic feet, then divide by the depth you want. With crushed stone at a typical planning figure of about 1.4 tons per cubic yard, one ton fills roughly 19 cubic feet. Spread that 4 inches deep and it covers about 58 square feet; spread it 2 inches deep and it stretches to about 116 square feet.
Gravel base calculator →The three-step math
- Tons to cubic yards. Divide the tons by the stone’s weight per cubic yard. At 1.4 tons per yard, 1 ton ÷ 1.4 ≈ 0.71 cubic yards.
- Cubic yards to cubic feet. Multiply by 27. That 0.71 yard becomes about 19.3 cubic feet.
- Cubic feet to square feet. Divide by the depth in feet (inches ÷ 12). At 4 inches, 19.3 ÷ 0.333 ≈ 58 square feet.
Run it backward to order: area × depth in feet ÷ 27 gives cubic yards, then multiply by the weight per yard to get tons. Our gravel weight per yard guide explains why that weight figure moves with stone type, size mix, and moisture.
Coverage per ton at common depths
The table uses three weights per cubic yard so you can see how much the stone itself changes the answer. Lighter, airier stone spreads farther; dense, well-graded stone with lots of fines spreads less.
| Depth | 1.2 tons/yd³ | 1.4 tons/yd³ | 1.5 tons/yd³ |
|---|---|---|---|
| 2 in | ~135 sq ft | ~116 sq ft | ~108 sq ft |
| 3 in | ~90 sq ft | ~77 sq ft | ~72 sq ft |
| 4 in | ~68 sq ft | ~58 sq ft | ~54 sq ft |
| 6 in | ~45 sq ft | ~39 sq ft | ~36 sq ft |
| 8 in | ~34 sq ft | ~29 sq ft | ~27 sq ft |
These are loose-measure planning numbers from the arithmetic above, not a supplier’s guarantee. Ask the quarry or yard what weight per yard they use for the exact product on your ticket.
Why your real coverage comes up short
- Compaction. A plate compactor or roller squeezes air out of the stone, so the same tons end up thinner once packed. If the finished depth matters, plan for the compacted thickness and order a cushion. Lift-by-lift advice is in compacting gravel base in lifts.
- Soft or uneven subgrade. Stone disappears into ruts, low spots, and mud. Fix drainage and soft areas first so tons go toward depth, not filling holes.
- Edges and spill. Stone rolls off edges and gets tracked away. Long, narrow areas lose more per ton than a square pad.
- Moisture. Wet stone weighs more on the scale, so a ton of damp gravel holds a little less rock than a ton of dry gravel.
Matching the depth to the job
Depth is the biggest lever in this calculation, so choose it first. A refresh on an existing gravel driveway may only need a thin top-up, while a new base under pavement needs a thicker, compacted layer. Our depth-specific guides walk through the tonnage for the most common base thicknesses: four-inch gravel base, six-inch gravel base, and eight-inch gravel base. If you are sizing stone under new blacktop, tons of gravel base under 1,000 square feet of asphalt keeps the base and the hot mix as separate line items.
Stone size also matters. Driveway mixes with fines lock together and pack tight; clean washed stone stays open and spreads a bit farther per ton but does not bind the same way. Driveway gravel sizes covers which product fits which layer, and gravel driveway cost shows how tons, delivery, and spreading add up on a bill.
A quick worked example
Say you want a 10 by 20 foot parking pad with 4 inches of crushed stone. The area is 200 square feet. At about 58 square feet per ton, that is roughly 3.4 tons before any cushion for compaction or spill. Most homeowners round up to the next full ton or the yard’s delivery minimum rather than coming up short mid-spread. Plug your own size into the asphalt base calculator to check the figure, and use the main asphalt tonnage calculator later if the pad gets paved.
Questions people ask
How much does a ton of gravel cover at 4 inches?
Roughly 54 to 68 square feet, depending on the stone. At a common planning weight of about 1.4 tons per cubic yard, one ton covers close to 58 square feet at 4 inches deep before compaction.
How many square feet does a ton of gravel cover at 2 inches?
About 108 to 135 square feet, or close to 116 square feet at 1.4 tons per cubic yard. Thin top-ups stretch a ton the farthest.
Does compaction change how far a ton of gravel goes?
Yes. Packing the stone squeezes out air, so a layer that starts at 4 inches loose ends up thinner. Plan for the compacted depth you need and order a cushion.
How many cubic yards are in a ton of gravel?
Divide one ton by the stone's weight per cubic yard. At 1.4 tons per yard, a ton is about 0.71 cubic yards, or roughly 19 cubic feet. Ask your yard for the weight they use.
Related guides
- Gravel weight per yard
- Gravel base calculator for a driveway
- Four-inch gravel base: how many tons
- Driveway gravel sizes
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