Free Live Calculators

Landscaping Gravel Calculator — Tons & Cost

Calculate how many tons of gravel you need for a driveway, walkway, or garden bed by area, depth, and material — plus cost estimate.

Gravel Needed
11.5 tons
(exact: 11.11 tons — rounded up to the nearest half-ton, since suppliers sell in fixed increments)
Area: 480 sq ft
Volume: 200 cu ft = 7.41 cu yd

Volume = Area × Depth (converted to feet), then ÷27 to get cubic yards. Tons = Cubic Yards × Material Density. Density figures are typical averages — pea gravel and general gravel ≈1.4 tons/cu yd, crushed stone and river rock ≈1.5 tons/cu yd — but actual weight varies by moisture content, stone size, and compaction, so confirm the exact figure with your supplier before ordering. Always round up to the next half- or full-ton increment since gravel is sold in bulk units, not exact weights.

Reference Values

Last verified:
Category Range What It Means Status
Pea gravel ≈1.4 tons/cu yd (range 1.2–1.6) Small, rounded, smooth stones — common for walkways, drainage, and decorative beds. Lighter and more consistent than crushed stone. Good
Crushed stone ★ ≈1.5 tons/cu yd (range 1.35–1.7) Angular, machine-crushed rock that compacts tightly — the standard choice for driveway base and sub-base layers. ★ Best
River rock ≈1.5 tons/cu yd (range 1.4–1.75) Larger, smooth, rounded stones used mostly for decorative beds, drainage swales, and erosion control — doesn't compact as well as crushed stone. Good
General / generic gravel ≈1.4 tons/cu yd (range 1.4–1.7) Mixed or unspecified gravel blend — use this if you're not sure exactly what your supplier is delivering. Okay
Driveway base ★ 4–6 in depth Deeper base layer needed to support vehicle weight and resist rutting — 4 in minimum, 6 in for heavier vehicles or soft soil. ★ Best
Walkway 2–3 in depth Foot-traffic-only paths need less depth than driveways — 2–3 in over a compacted base is standard. Good
Decorative bed 2 in depth Mulch-replacement or landscaping accent beds — 2 in is enough to cover soil and suppress weeds without excess cost. Good

Source: Density figures aggregated from standard construction-materials weight references (e.g., TRORC and regional quarry cubic-yardage charts) and Inch Calculator's published gravel-calculator methodology. Actual density varies by moisture content, stone size, and compaction — always confirm exact figures with your supplier before ordering in bulk.

Worked Examples

Rectangular Driveway (Crushed Stone Base)

Length
40 ft
Width
12 ft
Depth
5 in (driveway base preset)
Material
Crushed stone (1.5 tons/cu yd)
≈11.11 tons

Volume = 40 × 12 × (5/12) = 200 cu ft = 7.41 cu yd. Weight = 7.41 × 1.5 ≈ 11.11 tons — round up to 12 tons since suppliers sell in full-ton increments and it's cheaper to have a little extra than to run short mid-job.

Circular Fire Pit Area (Pea Gravel)

Diameter
10 ft
Depth
2 in (decorative bed preset)
Material
Pea gravel (1.4 tons/cu yd)
≈0.61 tons

Area = π × 5² = 78.54 sq ft. Volume = 78.54 × (2/12) = 13.09 cu ft = 0.485 cu yd. Weight = 0.485 × 1.4 ≈ 0.68 tons — round up to about 0.7–1 ton since suppliers sell by the full or half ton.

Walkway (Direct Square Footage, River Rock)

Area
150 sq ft (entered directly)
Depth
3 in (walkway preset)
Material
River rock (1.5 tons/cu yd)
≈2.08 tons

Volume = 150 × (3/12) = 37.5 cu ft = 1.39 cu yd. Weight = 1.39 × 1.5 ≈ 2.08 tons.

Small Decorative Bed with Cost Estimate

Length
8 ft
Width
6 ft
Depth
2 in
Material
General gravel (1.4 tons/cu yd)
Price
$55 per ton
≈0.35 tons, ≈$19.25

Volume = 8 × 6 × (2/12) = 8 cu ft = 0.296 cu yd. Weight = 0.296 × 1.4 ≈ 0.41 tons. Cost = 0.41 × $55 ≈ $22.75 — small beds often hit a supplier's minimum-order or per-bag pricing instead of bulk-ton pricing.

Large Driveway, Deep Base

Length
60 ft
Width
14 ft
Depth
6 in (driveway base, deep end)
Material
Crushed stone (1.5 tons/cu yd)
≈23.3 tons

Volume = 60 × 14 × (6/12) = 420 cu ft = 15.56 cu yd. Weight = 15.56 × 1.5 ≈ 23.3 tons — round up to 24 tons since gravel is sold in full-ton increments.

How to Use This Calculator

  1. 1

    Choose how you'll enter the area

    Pick Rectangle (length × width), Circle (diameter), or enter a total square footage directly if you already know it.

  2. 2

    Enter your dimensions

    Fill in length/width, diameter, or square footage depending on the mode you selected.

  3. 3

    Pick a use case or enter a custom depth

    Driveway Base (4-6 in), Walkway (2-3 in), and Decorative Bed (2 in) presets auto-fill a typical depth — or type your own depth in inches.

  4. 4

    Select your material

    Pea gravel, crushed stone, river rock, or general/generic gravel — each uses a different density (tons per cubic yard) to convert volume into weight.

  5. 5

    Optionally add a price to see cost

    Enter a price per ton or per cubic yard (whichever your supplier quotes) to get an estimated total cost alongside the tons needed.

What Each Value Means

Cubic Yards (cu yd)
The standard bulk-ordering unit for landscaping gravel. Cubic yards = cubic feet ÷ 27, where cubic feet = area (sq ft) × depth (ft). Most suppliers quote and deliver gravel by the cubic yard or by the ton, not by the bag, once quantities get large.
Tons Needed (tons)
Cubic yards multiplied by the material's density (tons per cubic yard). Density varies by material and moisture — pea gravel and general gravel average about 1.4 tons/cu yd, while crushed stone and river rock average about 1.5 tons/cu yd.
Depth (inches)
How thick the gravel layer needs to be, measured in inches and converted to feet for the volume formula. Driveways need the deepest base (4-6 in) to support vehicle weight; walkways and decorative beds need much less (2-3 in).

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Frequently Asked Questions

How many tons of gravel do I need for my driveway?
Multiply the driveway's length by width to get square feet, then multiply by the depth in feet (inches ÷ 12) to get cubic feet. Divide by 27 to get cubic yards, then multiply by the material's density — about 1.5 tons per cubic yard for crushed stone. A 40×12 ft driveway at a 5-inch base depth needs roughly 11 tons of crushed stone. Always round up to the next full or half-ton, since suppliers sell gravel in bulk increments, not exact weights.
What's the difference between pea gravel, crushed stone, and river rock?
Pea gravel is small, smooth, and rounded — good for walkways and decorative beds but it shifts underfoot and doesn't compact tightly. Crushed stone is angular and machine-broken, so it locks together and compacts well, making it the standard choice for driveway base layers. River rock is larger and rounded like pea gravel but heavier, and it's mostly used for drainage, erosion control, and accent beds rather than load-bearing surfaces.
How deep should a gravel driveway be?
Most driveways need 4 to 6 inches of compacted base material — 4 inches for light passenger vehicles on stable soil, up to 6 inches for heavier vehicles, frequent use, or soft/clay-heavy soil. Walkways only need 2 to 3 inches since they carry foot traffic, not vehicle weight. Decorative beds typically use just 2 inches, enough to cover soil and suppress weeds without wasting material.
Why does gravel weight vary between suppliers?
Density depends on moisture content, stone size, and how tightly the material has settled or been compacted — wet gravel weighs noticeably more than dry gravel of the same volume, and finer material packs more densely than coarse material. That's why density figures are always given as a range (for example, 1.35 to 1.7 tons per cubic yard for crushed stone) rather than one fixed number. This calculator uses typical mid-range averages — always confirm the exact figure with your supplier before placing a bulk order.
Should I order extra gravel beyond the calculated amount?
Yes. Compaction settles material a bit more than the loose volume calculation suggests, and irregular ground, edges, and spillage during spreading all eat into your total. Rounding your ton estimate up to the next half-ton or full-ton increment (which most suppliers require anyway) usually covers this naturally. For large or complex projects, adding a small buffer of 5-10% on top of that is a safe practice.