How Much Gravel Do I Need for a Driveway?

Ordering gravel for a driveway comes down to three numbers: the area you are covering, the depth of each layer, and how your supplier sells the stone. Get those right and you can order once, with a sensible margin, instead of paying for a second delivery or a pile of leftover rock.

Step 1: Measure the driveway area

Measure the length and width of the area you will cover, in feet. For a straight driveway, that is a single rectangle. For anything more complex, split the layout into simple shapes, calculate each one, and add them together.

• Rectangles: length × width.
• Turnarounds and parking pads: measure them as separate rectangles and add them to the main run.
• Curves: measure the length along the center line of the curve and multiply by the average width. That is close enough for ordering gravel.
• The apron: if the driveway flares where it meets the road, include that extra area. It is easy to forget and is often where the heaviest traffic lands.

Round your measurements to the nearest half foot. Gravel is not sold precisely enough for inches of length to matter, but depth is a different story.

Step 2: Choose the depth of each layer

Depth has the biggest effect on the total, and it depends on whether you are building a new driveway or refreshing an existing one. A new gravel driveway is usually built in layers: larger crushed stone at the bottom for strength and drainage, and smaller stone or a compacting mix on top for a firmer driving surface.

These are common starting points, not engineering specifications. Soil, drainage, climate, and vehicle weight all change the right answer, so ask your local supplier or contractor what works in your area.

Which stone goes in which layer?

Product names vary by region, but a typical build looks like this:

• Base layer: large crushed stone (often sold as #3 or #4 stone) that locks together and lets water drain.
• Middle layer (optional): medium crushed stone such as #57, which fills gaps and spreads the load.
• Top layer: a compacting mix such as crusher run, dense-grade aggregate, or 3/4-inch minus. The fine particles bind the surface so it drives firmly.

Rounded stone such as pea gravel looks good but rolls under tires, so it tends to rut and migrate, especially on slopes. If you are unsure what a product is called locally, describe how you will use it and let the supplier recommend the stone.

Step 3: Convert area and depth to cubic yards

Bulk gravel is sold by the cubic yard or by the ton. Start with cubic yards. Because a cubic yard is 27 cubic feet and depth is usually measured in inches, the conversion simplifies to one formula:

Cubic yards = length (ft) × width (ft) × depth (in) ÷ 324

The 324 comes from 12 inches per foot multiplied by 27 cubic feet per cubic yard. For a 12 × 50 ft driveway at 4 inches deep: 12 × 50 × 4 ÷ 324 = 7.41 cubic yards.

It also helps to know how far one cubic yard goes at each depth:

Calculate each layer separately. The layers often use different stone at different prices, and suppliers load them as separate orders.

Step 4: Convert cubic yards to tons

Many quarries and landscape yards sell by the ton, so you need the weight of the specific stone. Crushed stone and gravel commonly weigh about 2,600 to 3,000 pounds per cubic yard, or roughly 1.3 to 1.5 tons. The exact figure depends on the rock type, the size of the stone, and how wet it is.

Tons = cubic yards × pounds per cubic yard ÷ 2,000

At 1.4 tons per cubic yard, the 7.41 cubic yards above weighs about 10.4 tons. If your supplier quotes density in pounds per cubic foot, multiply by 27 to get pounds per cubic yard. For example, 100 lb/ft³ is 2,700 lb per cubic yard, or 1.35 tons.

Always use your supplier’s own weight figure when you have it. A small difference in density adds up across a full truckload.

Step 5: Add an allowance, then round to how it is sold

Your measured volume is the minimum. Crushed stone settles when it is compacted, subgrades are rarely perfectly flat, and some material is always lost at the edges. An allowance of about 10% is a common starting point for driveway work. Use less for a simple top-up over a smooth base and more for a new build on uneven ground.

After adding the allowance, round up to the increment your supplier sells. Some sell by the whole or half cubic yard, others by the ton or tenth of a ton, and many have a minimum delivery charge.

Worked example: a new 12 × 50 ft driveway

Suppose you are building a new driveway on firm, well-drained soil, with a 4-inch base of large crushed stone and a 2-inch top layer of crusher run. The area is 12 × 50 = 600 square feet.

If this supplier sells by the half yard, you would order 8.5 cubic yards of base stone and 4.5 cubic yards of crusher run. If they sell by the ton, check their density figure, then round each layer up to their increment.

Bulk delivery or bags?

For a driveway, bulk delivery is almost always the practical choice. Bagged gravel is commonly sold in 0.5 cubic foot bags, which means 54 bags per cubic yard. The base layer in the example above would take more than 400 bags, which is far more expensive and far more work than a single truck delivery.

Bags make sense for small jobs: patching potholes, topping up a short section, or filling around a mailbox post. For those, the Gravel Calculator can compare bag and bulk quantities side by side.

Tips before you order

• Ask how the supplier sells. Confirm whether prices are per ton or per cubic yard, the minimum order, and the delivery fee.
• Check truck capacity. A typical dump truck carries roughly 10 to 15 tons, depending on the truck and local weight limits. A large order may need two loads.
• Plan the drop spot. Ask the driver to spread the load or dump it close to where you will work. Moving stone by wheelbarrow is slow.
• Check access. Loaded trucks are heavy. Keep them off septic systems, soft lawns, and fragile paving.
• Call 811 before you dig. If you are excavating for a new driveway base, contact 811 a few days ahead so underground utility lines can be marked.

Common mistakes to avoid

• Mixing up feet and inches for depth. Entering 4 feet instead of 4 inches multiplies the order by twelve.
• Forgetting extra areas. Aprons, turnarounds, and parking pads add up quickly.
• Ignoring compaction. Compacted crushed stone takes up less space than it did loose on the truck, so a 4-inch finished layer needs more than 4 inches of loose stone.
• Using rounded stone on slopes. Pea gravel and river rock roll and wash out on inclines.
• Estimating with the wrong density. A generic weight figure can be off by several tons on a large order. Ask your supplier.

Frequently asked questions