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Driveway gravel calculator · tons

Driveway Gravel Calculator

How much gravel for your driveway? Measure the drive, then work out the road base layer and the #57 top course.

1 · Material

2 · Two quick choices: depth, then size

2a · Pick a depth

A driveway is two layers: about 6″ of compacted road base, then 4″ of #57 on top. Calculate the base, then switch to “Top: #57 stone”; your measurements stay.

2b · Then measure your sections

Length × width in feet. Add as many sections as you need; we add them up.

Recommended order

26 tons

of Road Base (2"-fines)

≈ 16.8 yd³ · covers 720 sq ft at 6″ · 2 dump trucks

720 sq ft × 6 in ÷ 12 ÷ 27 = 13.33 yd³ × 1.55 t/yd³ = 20.7 tons. Plus 25% for compaction and spreading, rounded up to a whole ton.

3 · Get your delivered quote

One ton of road base

  • ≈ 0.65 yd³ (17 cu ft)
  • covers 35 sq ft at 6″
  • a yd³ weighs about 3,100 lb
  • a full truck is about 21 tons
Convert tons ↔ cubic yards →

About this material: Road Base (2"-fines) →

How much does a ton of driveway gravel cover?

Cubic yards = area (sq ft) × depth (in) ÷ 12 ÷ 27. Tons = cubic yards × the material’s density. The calculator then adds the buffer for compaction and spreading and rounds up. Tons use our catalog densities: road base 1.55 t/yd³; #57 stone 1.35 t/yd³; crushed concrete road base 1.35 t/yd³; asphalt millings 1.4 t/yd³.

Swipe the table sideways →

MaterialDepthUsed forCoveragePer 100 sq ft
Road Base (2"-fines)4″Shed pad or walkway, compacted.52 sq ft per ton1.91 tons
Road Base (2"-fines)6″Home driveway, compacted. (typical)35 sq ft per ton2.87 tons
Road Base (2"-fines)8″RVs, trucks or soft ground.26 sq ft per ton3.83 tons
#57 Crushed Stone (¾" – 1")2″Refresh an old top course.120 sq ft per ton0.83 tons
#57 Crushed Stone (¾" – 1")3″Light traffic over a firm base.80 sq ft per ton1.25 tons
#57 Crushed Stone (¾" – 1")4″New top course over the base. (typical)60 sq ft per ton1.67 tons
Crushed Concrete Road Base4″Pads and paths, compacted.60 sq ft per ton1.67 tons
Crushed Concrete Road Base6″Most home driveways, compacted. (typical)40 sq ft per ton2.5 tons
Crushed Concrete Road Base8″RVs and trucks.30 sq ft per ton3.33 tons
Recycled Asphalt Millings3″Resurface an old driveway.77 sq ft per ton1.3 tons
Recycled Asphalt Millings4″New driveway, compacted. (typical)58 sq ft per ton1.73 tons
Recycled Asphalt Millings6″Soft ground or heavy trucks.39 sq ft per ton2.59 tons

Before the buffer. Updated November 2026

How much driveway gravel for common projects

Swipe the table sideways →

ProjectDepthAreaEstimate
100 ft × 12 ft drive — base layer4″1,200 sq ft~15 cubic yards lime rock base
100 ft × 12 ft drive — top course4″1,200 sq ft~15 cubic yards #57 stone
50 ft × 10 ft short drive8″500 sq ft~12 cubic yards total
200 ft rural drive8″2,400 sq ft~60 cubic yards total
Turnaround 30 ft × 30 ft8″900 sq ft~22 cubic yards total

Before the buffer. Measure your own areas above for an order quantity.

Driveway gravel mistakes to avoid

Skipping the base layer

A single 4-inch layer of #57 on bare soil ruts within a season. The base layer is what carries the weight; the top course is just the finish. Always plan two layers.

Too thin overall

A 2-inch driveway looks like a driveway for 30 days. Florida sand and clay subgrade demands 8 inches total minimum — 4 inches of base + 4 inches of top course — to hold up.

Wrong top stone

Pea gravel and round river stone roll under tires. #57 angular limerock interlocks and stays put. For long rural drives, recycled asphalt millings harden over time and resist washboarding.

No crown or slope

A flat driveway holds water and washes out at the low end. Build a 2–3% crown from center to edges so water sheds off rather than channels through the gravel.

No edge containment

Without landscape timbers, pavers, or compacted shoulders, gravel migrates into the yard. Expect to lose 1–2 inches of depth per year to bleed-out without edges.

Skipping geotextile fabric

Fabric between the subgrade and the base layer keeps fines from pumping up into the gravel. A driveway without fabric loses base material to the soil and needs regrading much sooner.

Driveway gravel calculator questions

A 100 ft × 12 ft driveway with a 4-inch base and 4-inch top course needs about 30 cubic yards total, or roughly 42 tons across both layers.

Need another material? All calculators →

Know how much driveway gravel you need? Get your delivered quote.

We’ll quote your 26 tons of road base, delivery included.