Gravel Calculator

What this gravel calculator is for

Landscapers, DIY homeowners, and small contractors use this gravel calculator to answer how much gravel a rectangular area needs before they call the quarry. You supply length and width in feet, depth in inches, a gravel type with typical bulk density, and an optional price per ton. The page returns cubic yards, cubic feet, tons, and an estimated material cost—plus depth scenarios at 2″, 3″, 4″, and 6″ so you can compare a thin walkway lift against a heavier driveway base.

Search intent is quantity-first: gravel calculator cubic yards, tons of gravel needed, and gravel driveway coverage. It is a planning tool, not a structural design check for load-bearing road sections.

The math in plain language

Volume starts as a rectangular prism: length × width × (depth ÷ 12) gives cubic feet. Divide by 27 to convert to cubic yards, the unit most bulk suppliers quote for delivery. Weight in tons equals cubic yards multiplied by the selected density (crushed stone, pea gravel, river rock, or road base). Estimated cost is tons × your price per ton entry.

Densities are typical bulk values; moisture and compaction change what a scale reads. If your supplier sells by the ton with a certified weight, use their sheet instead of assuming a blog constant.

Choosing depth and gravel type

• 2–3 inches: Often used for decorative paths and topping over firm subgrade when foot traffic only.
• 4 inches: Common target for residential parking pads when the sub-base is already stable.
• 6 inches and more: May be needed for soft soil or heavier vehicle loads—confirm with a local contractor or engineer.

Crushed stone and road base pack tighter and read heavier per cubic yard than pea gravel, which is rounded and can roll under tire load. River rock sits between them for drainage beds and dry creek aesthetics.

Ordering and waste

Real sites are rarely perfect rectangles. Add 5–10% cushion for uneven subgrade, shoulder loss, and wheel ruts during placement—the widget does not add waste automatically. Ask whether delivery minimums, tailgate spread fees, or Saturday surcharges apply. For long driveways, compare this estimate to a measured takeoff from a paving contractor before you lock tonnage.

Related site and landscape tools

Gravel often shares a job with other ground-cover and hardscape math. Estimate organic beds with the mulch calculator, structural flatwork with the concrete slab cost calculator, and finished asphalt or paver drive pricing with the driveway paving cost calculator.

Recycled asphalt millings calculator pages help when you are comparing RAP lifts to stone base. For full-yard budgets that include grading, plants, and irrigation, pair quantities here with the landscaping cost calculator so material and labor lines stay in one conversation.

When to get a pro measure

Curved drives, stepped terraces, and drainage swales need stationing or CAD takeoffs this rectangle model cannot see. If water pools after rain, fixing grade may matter more than adding another inch of stone. For commercial entrances with DOT specs, rely on engineered section thickness—not a generic depth dropdown.

Steep grades may require geotextile separation between native soil and aggregate. French drains beside the drive use a different volume model than surface coverage; do not reuse driveway tonnage for perforated pipe trenches without a separate calc.

Cost levers beyond tonnage

Material is only part of the invoice. Haul distance, fuel surcharges, and whether the truck can tailgate spread on your property affect the bottom line. Some yards price crushed stone lower per ton at fifteen-ton minimums while charging more for five-ton split loads. Compare delivered ton cost, not just the number this page prints.

DIY placement with a rented skid steer still has time cost. A thin 3″ lift over a large rectangle moves fast; a 6″ base over soft fill may need compaction equipment you do not own. Factor rental and labor when you decide whether gravel is a weekend project or a paving crew line item.

Disclaimer

Educational estimates only. Density, moisture, compaction, haul limits, and local pricing vary. Confirm quantities and structural requirements with your supplier and a qualified contractor before ordering.