Paver Base Calculator — West Virginia

This calculator sizes the two layers that sit under a paver patio or walkway. The bottom layer is a compacted crushed-stone base. The top layer is a thin bedding sand that the pavers rest on. The tool figures each layer and reports the total in tons.

The estimate begins with the area you are covering and the depth of each layer. The calculator multiplies area by depth to get a volume in cubic feet. It divides that number by 27 to convert to cubic yards. It then multiplies by the material's density to give a weight in tons.

Each layer uses its own density. Crushed stone base weighs about 1.4 tons per cubic yard. Bedding sand weighs about 1.35 tons per cubic yard. The calculator runs the math twice, once for the base and once for the sand. It adds the two weights together for a combined total.

Depth is entered in inches, so the tool converts inches to feet before the volume step. A 4-inch layer becomes 0.333 feet. This keeps the units correct and the tonnage accurate.

The last step adds a waste allowance. The default is 10 percent. This covers compaction, uneven ground, and small spills during the pour. You can raise or lower the allowance to match your site.

The result gives you the tons of base stone, the tons of bedding sand, and the combined total. Use these numbers when you place an order with a quarry or landscape yard. Bulk material is sold by weight, so a tonnage figure is exactly what the supplier needs. Enter your patio size and layer depths to see your totals.

Layer depth drives the whole estimate. Two numbers matter: the depth of the crushed-stone base and the depth of the bedding sand. Set both before you read the tonnage.

A standard patio or walkway uses 4 to 6 inches of compacted crushed-stone base. Four inches works for foot traffic on firm, well-drained ground. Six inches suits soft soil, clay, or areas that stay wet. More base spreads the load and holds the surface flat over time.

Bedding sand sits above the base in a thin, even layer. About 1 inch is standard. This layer sets the pavers and lets you level small differences. Keep it thin. A deep sand layer shifts under load and lets the pavers rut.

Driveways and any surface that carries vehicles need more base. Plan for a thicker crushed-stone layer than a patio uses. Vehicle weight is far higher than foot traffic, so the base must be deeper and well compacted. Check your local frost depth as well, since deeper frost calls for a deeper base.

Remember that base depth means the depth after compaction. Crushed stone settles when you run a plate compactor over it. Order and place enough loose stone to reach the finished depth once packed. A later section covers how much extra to add.

Enter the base depth and the bedding depth as separate inputs. The calculator treats them as two layers with two densities. If you are unsure, start with a 4-inch base and a 1-inch bedding layer, then adjust for your soil and load. Firm the numbers before you order, because a shortfall stops the job.

Base material and bedding sand are sold by the ton or by the cubic yard, depending on the supplier. Knowing both units keeps your order clear.

A cubic yard is a measure of volume. It is a block 3 feet on every side, which equals 27 cubic feet. A ton is a measure of weight. To move between the two, you use the material's density.

This calculator converts volume to weight for you. It finds the cubic yards of each layer, then multiplies by density to reach tons. Crushed stone runs about 1.4 tons per cubic yard. Bedding sand runs about 1.35 tons per cubic yard. So one cubic yard of base weighs a little more than one cubic yard of sand.

Density is not fixed for every product. Crushed stone varies with the rock type and how tightly it packs. Sand varies with moisture, since wet sand weighs more than dry sand. The values here are solid planning figures, not exact lab numbers. Ask your supplier for the density of the exact product you buy.

Why report in tons at all? Bulk aggregate is weighed on a truck scale at the quarry. The ticket you receive lists tons. A tonnage estimate matches that ticket, so you can check what you paid for against what arrived.

If your yard sells by the cubic yard instead, the tool still helps. Take the tons and divide by the density to get cubic yards. For crushed stone, divide tons by 1.4. For sand, divide by 1.35. Either way, you order the right amount without guessing.

Crushed stone does not stay as loose as it arrives. When you run a plate compactor over it, the pieces lock together and the layer shrinks. This is compaction, and it is a good thing. It builds a firm, stable base. But it means loose stone settles below its poured depth.

Plan the finished depth first, then account for settling. A layer of crushed stone can lose a noticeable share of its loose height once packed. Order enough loose material to reach the finished depth after the compactor has done its work. If you order only for the finished depth, you will run short.

The calculator adds a waste allowance to cover this and more. The default is 10 percent. The allowance also covers uneven subgrade, spillage during spreading, and the material lost at the edges. On a rough or sloped site, raise the allowance.

Compact in layers, not all at once. Spread the stone in lifts of a few inches, then pack each lift before adding the next. Thick single lifts do not compact fully at the bottom. A weak lower layer lets the surface sink later.

Bedding sand is different. You screed it to a set depth and do not compact it before laying the pavers. So the sand layer needs little extra beyond normal spillage. The default allowance still covers it.

Add a bit more base if your ground is soft. Soft soil pushes up into the stone and steals depth. A geotextile fabric under the base helps here, and a later guide covers it. When in doubt, order slightly long. A small surplus is cheaper than a second delivery and a stalled job.

Once you know your tonnage, plan the delivery. Bulk crushed stone and sand arrive by dump truck. One standard dump truck holds about 10 to 14 tons. Your total tells you how many truckloads you need.

A small patio may need only a few tons. That fits in one load with room to spare. A driveway or a large patio can run past a single truck. If your total is above the truck limit, expect more than one delivery, or a larger vehicle. Ask your supplier what their trucks carry.

Order the base stone and the bedding sand as separate materials. They are different products with different uses. Keep them in separate piles on site so they do not mix. Mixed sand and stone is hard to sort and weakens both layers.

Think about where the truck will dump. Bulk material drops in a large pile. Pick a spot close to the work but clear of the dig. A pile on the patio footprint blocks your grading. A pile far from the work means a long wheelbarrow haul.

Protect the drop area. Dumping on grass or a soft lawn leaves ruts and stains. A tarp or a sheet of plywood keeps the pile off the surface and makes cleanup easier. It also stops fine sand from washing into the soil.

Check the weighed ticket when the truck arrives. It lists the tons delivered. Compare it against your estimate. A close match confirms the order is right. Have your tools and helpers ready, because bulk material sits in the open. Rain adds weight to sand and can wash a loose pile out of shape.

A good base starts with a clean, correct dig. The tonnage the calculator gives you assumes the hole is the right depth across the whole area. If the dig is shallow or uneven, your numbers will not fit.

Start by marking the shape and setting the total depth. The dig must hold the base, the bedding sand, and the paver itself. Add all three thicknesses to find how deep to excavate. Remove all sod, roots, and topsoil, since these soft materials rot and settle.

Check the depth at many points, not just the corners. A high spot in the middle steals base depth and creates a weak zone. Grade the bottom of the dig smooth and firm. Compact the exposed soil, called the subgrade, before any stone goes in. A loose subgrade sinks under the finished patio.

Set a slope for drainage. The finished surface should fall away from the house. A common target is about a quarter inch of drop per foot. Build this slope into the subgrade and carry it up through the base. Water that pools under pavers weakens the base and heaves in frost.

Edges hold the whole assembly together. Without a firm edge, the base spreads sideways and the outer pavers drift. Plan an edge restraint around the perimeter. Spike it into the compacted base, not into loose sand.

Dig a little wider than the paver field. The base should extend a few inches past the paver edge on all sides. This gives the edge restraint solid ground to sit on. It also stops the outer stones from sliding into the surrounding soil over time.

Most base shortfalls come from a few repeat errors. Knowing them ahead of time saves a second trip to the yard.

The first mistake is entering depth in the wrong units. The tool wants inches. If you type feet where inches belong, the estimate swings far off. Read your depth back before you trust the total. A 4 should mean 4 inches, not 4 feet.

The second mistake is forgetting compaction. Crushed stone settles when packed. People order for the finished depth and come up short once the compactor runs. Order for the loose depth needed to reach the finished depth, or lean on the waste allowance to cover it.

The third mistake is skipping the bedding sand. Some estimates count only the base stone. The sand is a separate material with its own weight. This calculator sizes both, so do not drop the bedding layer from your order.

The fourth mistake is using one density for everything. Base stone and sand do not weigh the same per cubic yard. Mixing the two densities throws off the tonnage. Keep the two layers separate in the math, as the tool does.

The fifth mistake is measuring a rough area as a clean rectangle. Curves, steps, and cutouts change the true area. Break an odd shape into simple parts, size each part, then add them. An area that is too small leaves you short of stone.

The last mistake is ordering exactly the estimate with no margin. Ground is uneven and spills happen. Keep the waste allowance on, and round your order up to the next practical amount. A small surplus is far cheaper than a stalled job and a return trip.