Gravel: How Much Do I Need? (2026 Estimating Guide)

Know what I see on almost every DIY gravel project gone wrong? Either a pile of leftover material sitting in the yard for six months, or a thin, patchy layer that washes out after the first hard rain. Both problems come from the same place: nobody ran the numbers before ordering.

The formula is straightforward. Multiply length x width x depth (all in feet), divide by 27, and add 10-15% for waste. That gives you cubic yards. For tons, multiply the cubic yards by 1.35 (most gravel weighs about 2,700 lbs per yard). Run your numbers through our Gravel Calculator for an instant answer.

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Quick Answer: How Much Gravel for Common Projects

These are starting estimates. Your actual numbers depend on the depth you need, the type of gravel, and how much settling and compaction you should plan for.

Step 1: Measure Your Project Area

Before you call the supplier, you need three measurements:

• Length in feet
• Width in feet
• Depth in inches (you will convert this to feet for the formula)

For rectangular areas, this is simple. For irregular shapes, break the area into smaller rectangles and calculate each one separately, then add them together.

Common depth recommendations by project:

Going thinner than the minimum means the gravel shifts and the soil shows through within a season. I have seen homeowners try to stretch material by going 1 inch deep on a walkway. By the following spring, it looked like bare dirt with a few rocks scattered on top.

Step 2: Run the Formula

Here is the calculation, step by step:

1. Convert depth from inches to feet: depth (in) / 12 = depth (ft)
2. Calculate volume: length (ft) x width (ft) x depth (ft) = cubic feet
3. Convert to cubic yards: cubic feet / 27 = cubic yards
4. Add waste factor: cubic yards x 1.10 = adjusted cubic yards (10% overage)
5. Convert to tons (if ordering by weight): cubic yards x 1.35 = approximate tons

The 1.35 conversion factor works for most crushed gravel and drain rock. Pea gravel and river rock are slightly lighter (closer to 1.2-1.3 tons per yard). Always confirm with your supplier because density varies by material and moisture content.

Use our Gravel Calculator to skip the math entirely. Enter your dimensions and it handles the rest.

Step 3: Pick the Right Gravel Type

Not all gravel is the same, and using the wrong type is an expensive mistake. Here is what works for each application:

Crushed Stone (3/4-inch) - $35-$80 per cubic yard

The workhorse. Angular edges lock together and compact well. Best for driveways, parking pads, and structural base layers under pavers or concrete. This is what most contractors reach for when they need something that stays put.

Pea Gravel - $30-$60 per cubic yard

Smooth, rounded stones about 3/8 inch in diameter. Popular for walkways, patios, play areas, and between stepping stones. Comfortable to walk on, drains well, but it migrates. You will need edging or borders to keep it contained.

Drain Rock (1-1/2 inch) - $35-$75 per cubic yard

Large, washed stones with no fines. Purpose-built for drainage: French drains, foundation perimeter drains, dry wells. Water flows right through. Never use this for a walking surface or driveway.

Base Rock / Road Base - $18-$45 per ton

A blend of crushed stone and fine material that compacts into a solid, stable layer. Goes underneath everything: driveways, patios, retaining walls, sheds. You rarely see this on the surface, but every good project has it underneath.

Decomposed Granite (DG) - $40-$80 per cubic yard

Finely crushed granite that packs down to a firm, natural-looking surface. Common in the Southwest and West Coast for pathways, patios, and xeriscape areas. Needs to be replenished every 2-3 years as it breaks down.

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Worked Example 1: Pea Gravel Patio

A homeowner wants a 10 ft x 15 ft pea gravel patio at 3 inches deep.

Material cost: 1.53 yards of pea gravel at $40/yard = $61 Delivery fee: $50-$200 depending on distance (source: local supplier pricing, 2026) Landscape fabric: $0.15-$0.25/sq ft = $22-$37 Steel edging: $2-$4/linear ft for 50 ft perimeter = $100-$200

Total estimated cost: $233-$498 for a 150 sq ft patio

Pro tip: Order in full-yard increments. Most suppliers will not deliver a half yard by itself. If your calculation comes to 1.5 yards, order 2 yards. Use the extra to top off low spots after the first rain.

Worked Example 2: French Drain

A contractor is installing a 60-foot French drain with a 12-inch wide, 18-inch deep trench.

Material cost: 3.83 yards of drain rock at $55/yard = $211 Delivery fee: $75-$200 4-inch perforated pipe: $0.50-$1.00/ft x 60 ft = $30-$60 Filter fabric: $0.10-$0.20/sq ft, wrapping trench = $24-$48

Total materials: $340-$519

According to HomeGuide’s 2026 French drain pricing guide, installed cost runs $20-$55 per linear foot. At 60 feet, that puts the fully installed price at $1,200-$3,300, which includes labor for trenching, grading, and backfill.

Note: For French drains, use 15% waste factor instead of 10%. The irregular trench bottom and compaction around the pipe eat more material than a flat surface application.

Tons vs. Cubic Yards: Which Should You Order?

Suppliers sell gravel two ways, and the one you choose affects your total cost.

• Cubic yards - measured by bucket scoop at the yard. Most common for small residential loads (1-10 yards). Easier to visualize.
• Tons - measured on a truck scale. More common for large deliveries (10+ tons). More accurate because moisture does not change the weight.

Conversion rule of thumb: 1 cubic yard of gravel weighs approximately 2,700 lbs (1.35 tons). This varies by material:

Source: USDA Natural Resources Conservation Service material density tables and HomeAdvisor 2025 aggregate data.

When comparing prices, convert everything to the same unit. A supplier quoting $45/ton sounds cheaper than another at $55/yard, but once you convert, $45/ton equals roughly $61/yard for crushed stone. Always do the math.

Use our Cubic Yard Calculator if you need to convert between volume units quickly.

Delivery: What to Know Before You Order

Gravel delivery is where surprises happen if you are not prepared.

• Minimum order: Most suppliers require a 1-yard or 1-ton minimum for delivery. Some require 3-5 yards.
• Delivery fee: Typically $50-$200 depending on distance from the yard (source: local supplier pricing, 2026). Some suppliers include delivery above a certain quantity (often 5+ yards).
• Truck access: A dump truck needs at least 10 feet of width and 14 feet of overhead clearance. Measure before you order.
• Dump location: Mark exactly where you want the pile. Once it is on the ground, moving gravel by hand is brutal. A cubic yard of crushed stone weighs 2,700 lbs.
• Short loads: Ordering less than the truck minimum (usually 10-12 yards for a tandem) often triggers a short-load surcharge of $50-$100.

If you need less than a yard, bagged gravel from a home center works but costs significantly more, often $5-$8 per 0.5 cubic foot bag versus $50/yard in bulk. That premium adds up fast.

Common Mistakes That Cost You Money

After 20 years in the trades, these are the gravel mistakes I see over and over:

1. Skipping the landscape fabric. Without it, gravel sinks into the soil within a year. You will need to add more material every season. Spend the $0.15/sq ft now and save yourself the hassle.

2. Not accounting for compaction. Crushed stone and base rock compact 10-15% when you run a plate compactor over them. If you need 4 inches of compacted base, you need to spread 4.5-5 inches loose. Factor this into your order.

3. Wrong gravel for the job. Pea gravel on a driveway will rut and shift. Drain rock on a walkway is uncomfortable and unstable. Base rock on a decorative patio looks like a construction site. Match the material to the application.

4. Forgetting edging. Any loose gravel surface needs a border. Steel landscape edging, pressure-treated lumber, or stone borders keep the material contained. Without them, gravel migrates into the lawn, garden beds, and everywhere else.

5. Ordering by the bag when bulk is cheaper. Anything over half a cubic yard, buy in bulk. A cubic yard of pea gravel in bags from a home center runs $250-$350. The same amount from a landscape supplier is $30-$60. That is not a typo.

Pro Tips for Getting Your Order Right

• Call the supplier, do not just order online. Ask about their specific material weights and whether the price includes delivery. Suppliers within 10 miles of a quarry are typically 20-30% cheaper than retail.
• Order on a dry day if possible. Wet gravel weighs more, which means you get fewer cubic yards per ton. Not every supplier adjusts for moisture.
• Have a wheelbarrow and shovel ready. Even with a well-placed dump, you will need to spread and level the material by hand.
• Compact in lifts. For base layers, compact every 2-3 inches rather than dumping the full depth and compacting once. You get a much more stable result. The National Asphalt Pavement Association recommends maximum 4-inch lifts for proper compaction.

FAQ

How many yards of gravel do I need for 100 square feet?

For a 2-inch depth, you need about 0.62 cubic yards. For 3 inches, roughly 0.93 yards. For 4 inches, approximately 1.23 yards. Add 10% for waste. Use the Gravel Calculator to get exact quantities for your dimensions.

How much does a yard of gravel cost?

Gravel costs $30-$75 per cubic yard for most types, with pea gravel at $30-$60/yard and crushed stone at $35-$80/yard. Delivery adds $50-$200 depending on distance. Prices vary by region and supplier (source: HomeAdvisor 2025, local supplier pricing 2026).

How many tons of gravel do I need for a driveway?

A standard single-car driveway (10 ft x 40 ft at 4 inches deep) needs roughly 7-8 tons. A two-car driveway (20 ft x 40 ft at 4 inches deep) needs 14-16 tons. See our full driveway gravel estimating guide for detailed calculations.

Is it cheaper to buy gravel by the ton or by the yard?

It depends on the supplier, but per-ton pricing is generally more accurate and often slightly cheaper for larger orders. Always convert both quotes to the same unit before comparing. One cubic yard of crushed stone equals roughly 1.35 tons.

How thick should gravel be for a walkway?

A minimum of 2 inches for decorative gravel walkways, but 3 inches is better for durability and coverage. If you are using gravel as a base under pavers, plan for 4-6 inches of compacted base rock (source: ICPI Interlocking Concrete Pavement Institute installation guidelines).

Get Your Gravel Estimate Right the First Time

The difference between a gravel project that looks great for years and one that turns into a muddy mess comes down to three things: the right type, the right depth, and the right quantity. Run the numbers before you call the supplier. Use the formulas in this guide or plug your dimensions into our Gravel Calculator and get an answer in seconds.

If you are a contractor estimating gravel for clients, EstimationPro handles the full workflow. Build the estimate, send a professional proposal, and let the automated follow-up sequence chase the approval while you are on the next job. Try EstimationPro free and stop spending your evenings on spreadsheets.

Prices reflect 2026 national averages based on HomeAdvisor, HomeGuide, and local supplier data. Actual costs vary by region, material availability, and market conditions. Always get quotes from local suppliers for your specific project.