How to Order, Lay and Finish Gravel: A Homeowner's Guide

How much gravel you need

Multiply length by width by depth, all in feet, to get cubic feet. Divide by 27 to get cubic yards, because a cubic yard holds 27 cubic feet. Add about 10 percent for waste and uneven ground (Washington State DOT estimating tables add 10 percent for stockpile waste). Suppliers sell by the ton or the cubic yard, and gravel runs about 1.4 tons per cubic yard, so multiply yards by 1.4 to estimate tons.

Worked example, a patio base: a 12 ft by 12 ft patio with a 4 in compacted base. Area is 12 x 12 = 144 sq ft. Four inches is 0.33 ft, so 144 x 0.33 = 48 cu ft. Divide by 27 and you get 1.78 cu yd. Add 10 percent and you get 1.96, so order 2 cu yd, or about 2.7 tons (1.96 x 1.4).

Worked example, a garden path: 3 ft wide, 30 ft long, 3 in of crushed stone. Area is 90 sq ft, and 3 in is 0.25 ft, so 90 x 0.25 = 22.5 cu ft, which is 0.83 cu yd. With 10 percent added, order about 0.92 cu yd, or roughly 1.3 tons.

These figures describe the finished volume in the hole. Crushed base stone is delivered loose and compacts down: the Washington State DOT unit-weight table implies about 25 to 30% more loose volume than the finished compacted volume, so for a compacted base order the calculated volume plus 25 to 30%, and ask your supplier for their own factor. For a loose top course that is only raked level, the 10 percent allowance is usually enough. If you buy bags, read the label for cubic feet per bag and divide your cubic feet by that number.

Choosing the right type of gravel

Gravel is a loose term. The University of Maine Extension notes that gravel and crushed stone are often used interchangeably, so confirm exactly what is on the delivery ticket. What matters is particle shape and the amount of fine material.

Crushed stone has sharp edges and a mix of sizes, which is why Oregon State Extension recommends 3/4 minus crushed rock as paver base: the angular pieces lock together and compact easily. Minus means the pile includes everything smaller than 3/4 in, down to dust. Material with fines is sometimes sold as road base or crusher run, and it is the right choice for a surface that must stay firm.

Pea gravel and other rounded stone move under foot and tires. Penn State Extension describes pea stone as a rounded footing material, and rounded pieces do not interlock. Use it as a thin top layer over a firm base, not as the base itself. Clean stone with the fines washed out drains freely but will not compact as tightly, so it suits drainage trenches and the surface of a decorative path better than a patio base.

Source quality matters too. Penn State warns that limestone dust can compact into a very hard surface over time, and the Pine Hall Brick technical bulletin cautions that limestone-based material can cause efflorescence, a chalky deposit, on pavers. If you are laying pavers, ask what rock the base is made from.

What to buy

Gravel is only part of the shopping list. Buy the right category of each item before you order stone, because the tools decide how well the stone performs.

A plate compactor is the standard tool for patios and paths. ICPI says a compactor for setting pavers should deliver at least 5,000 lb of force at 75 to 100 hz. For a base, check the manufacturer's stated minimum lift thickness for your machine. Penn State notes that walk-behind compactors compact only about 1 in of material, so on a deep base use shallow lifts.

• Gravel or crushed stone of the type and size you chose, with the delivery ticket stating the product name.
• Edging that suits the surface: plastic, metal, precast concrete or wood restraints for paver areas, wood, stone or commercial edging for paths (UMaine), and plastic, precast concrete, metal or wood for pavers (Oregon State).
• Geotextile fabric if the site needs it: woven polypropylene for weed suppression under a path, or a non-woven separation fabric over soft soil.
• Landscape staples to pin fabric, spaced about every 2 ft along the finished edge (UMaine).
• A plate compactor (rented) or hand tamper, a rake, a long straightedge or screed board, a level, stakes and string.
• A wheelbarrow, and a tarp or plywood to protect the lawn at the delivery spot.

Preparing the site

Mark your excavation line about 8 in outside the finished edge (Oregon State), so the compacted base runs past the edge restraint stakes. ICPI wants the subgrade compacted to 98% standard Proctor density; if you cannot get a firm, non-pumping subgrade, lay geotextile and add base depth.

Dig out the turf and soft topsoil. The excavation depth is the base plus any bedding sand plus the thickness of the surface material. For a gravel path, UMaine digs about 6 in to fit 3 in of sand and 3 in of stone. Compact the exposed subgrade before adding stone. ICPI recommends at least 98 percent of standard Proctor density for pedestrian areas and residential driveways, which a contractor can verify with testing. If the soil stays wet or will not firm up, ICPI says it may need drainage or stabilizing, and a separation geotextile is sometimes used between fine soil and the base.

Check for utilities before you dig, and check whether your town requires a permit for pads or driveways.

Step by step

• 1. Stake the outline and set string lines at the finished height, sloping away from buildings.
• 2. Excavate to the total depth, keeping the bottom as level and uniform as the finished surface will be.
• 3. Compact the subgrade with the plate compactor. Fix soft spots by digging them out and refilling with base stone, never with sand.
• 4. Lay geotextile if you are using it, overlapping seams at least 12 in (Penn State) and pinning it at the edges.
• 5. Install edging for paths and loose-gravel areas now. Paver restraints can go in before the sand or after the pavers (ICPI).
• Spread and compact base stone in lifts of 3 to 4 in for a hand tamper or a typical rental plate compactor, and never more than 6 in, and only with a heavy machine. Check the rental company's maximum lift for their machine.
• 7. Compact each layer with several passes. Check the surface with a straightedge: ICPI allows about 3/8 in of variation over 10 ft.
• 8. For a path or driveway, spread the final stone layer and rake it to the crown or slope. For pavers, continue to the sand layer described in our sand guide.
• 9. Rake, walk over it, and fill low spots with more stone rather than leaving them.

How deep and how to finish

Depth depends on load, soil and climate, and sources give ranges rather than one number. Where we have a source, the figures below are compacted depths.

• Garden path: about 3 in of crushed stone under 3/4 in over fabric and sand (UMaine).
• Walk or patio base under pavers: 4 to 6 in of compacted aggregate (ICPI, Oregon State), plus 1 in of bedding sand.
• Paver driveway: 6 to 8 in of compacted aggregate, more over weak soil or in freezing climates (ICPI).
• Soft clay or anything driven on: Oregon State says use a thicker base and ask your supplier.
• Loose gravel areas with no vehicle load: we found no official minimum in the pages we could read, so ask a local supplier.

Common mistakes

• Using round pea gravel as a structural base. It does not lock together and shifts under load.
• Skipping edging, then watching gravel creep into the lawn. UMaine notes gravel rolls and shifts underfoot.
• Compacting one thick layer instead of several thin ones, which leaves the lower stone loose.
• Compacting dry, dusty stone. Add water so it holds together when squeezed.
• Filling hollows in the base with sand. ICPI warns that depressions will show up in the finished surface, so fill them with stone and compact.
• Ignoring drainage. A flat base on wet soil will pump fines upward and rut.
• Ordering exactly what the arithmetic says. Leave the 10 percent allowance and recheck depth after compacting.

Cost and ordering tips

Bags make sense for small jobs, repairs and spots a truck cannot reach, but the cost per cubic foot is higher than bulk, and hauling dozens of bags is hard work. Bulk delivery by the cubic yard or ton suits anything over about a yard. We are not quoting prices because they vary by region and quarry.

Before ordering, ask the supplier: what the product is called and its maximum size; how many fines it contains; what the rock is; whether it is sold by weight or volume and what a yard weighs in their pile; what the minimum load and delivery fee are; and whether they can tip the load where you want it.

Maintenance and later top-ups

Loose gravel thins out where people walk and where tires turn. Rake it back into the traffic areas once or twice a year, and top up with the same type and size so layers do not segregate.

On a driveway, regrade the crown and shoulders after heavy rain or plowing. Penn State recommends a 1 to 2 percent crown for aggregate surfaces. Pick up leaves before they decompose into soil on top of the stone. Replace edging that heaves in frost. If ruts form, rake the surface, add stone and compact, rather than just dumping stone into the rut.

Edging and landscape fabric

Edging does two jobs: it holds the stone in and it keeps the base from spreading. Oregon State says that without edge restraints pavers will move and separate, and UMaine recommends edging for patios and walkways because gravel rolls. Choose edging that matches the load: lighter material for pedestrian paths, concrete restraints for driveways (ICPI recommends concrete for drives). ICPI says plastic, steel and aluminum restraints can go in after the pavers, provided the compacted base extends past the stakes by no more than 10 in on a residential project.

Fabric is a judgment call, and sources are not unanimous. UMaine recommends commercial-grade woven polypropylene between a sand layer and the stone, to let water drain, discourage weeds and stop crushed rock mixing into the sand. ICPI uses geotextile mainly to separate fine soil from base stone when needed. Fabric does not stop weed seeds that settle on top, and it can complicate later regrading. Penn State advises covering fabric within 48 hours of exposure to UV light.

Shed bases and driveways: what the sources say

We did not find an extension or government page that sets a depth for a gravel shed pad, so use the patio logic and follow the shed maker's instructions. The same principles apply: remove turf, compact the subgrade, use angular crushed stone in compacted layers, extend the pad beyond the footprint, and slope the surface away from the building. A pad on soft or wet soil needs more depth and better drainage.

For a driveway, the only published depth we confirmed is ICPI's 6 to 8 in of aggregate under pavers, with more over weak soil. Plain gravel drives are different surfaces, and the pages we read do not give an official depth for them. Ask a local aggregate supplier or your public works office, and check local rules on driveway materials and aprons.

Before you start: utilities, permits and safety

Before you dig anywhere, call 811 (the US call-before-you-dig line) a few business days ahead so utility lines are marked free of charge. Check your local rules for permits when you build a shed pad, driveway, wall or change the grade of your lot.

Wear a dust mask, gloves and eye protection when handling crushed stone and dry fines, lift bags with your legs (many weigh 40 to 60 lb), and do not stand beside a bulk load when it is tipped.

Common gravel project sizes

Each row uses the depth shown and includes 10% extra for waste. Change any number in the gravel calculator.

Frequently asked questions

Sources: University of Maine Cooperative Extension: weed barrier under stone, Oregon State Extension: 10-Step Guide to Installing Pavers, ICPI Tech Spec 10: Application Guide for Interlocking Concrete Pavements, Penn State Extension: Construction of Equine All-Weather Paddocks, Pine Hall Brick Technical Bulletin 5: Bedding and Joint Sand. Read 7 November 2026.