Paver Calculator

How many pavers per square foot

Paver count per square foot is set by the face size, adjusted slightly by joint width. Larger formats use far fewer pieces and go down faster, but they are less forgiving — a large slab telegraphs every dip in the base, so a flat, well-compacted base matters more as the format grows.

Figures are for nominal sizes before joints. The calculator above applies your actual joint width, which lowers the count slightly.

Waste allowance by laying pattern

Waste is driven by how many perimeter pieces have to be cut, and diagonal cuts waste more than square ones. The shape of the field matters more than most people expect: a curved edge will waste more material than choosing herringbone over running bond.

The base is the job — not the pavers

Nearly every failed paver installation failed in the base, not the surface. The structural layer is compacted crusher run — a graded stone-and-fines mix that locks together and drains — placed in lifts and compacted, typically 4 inches under a patio or walkway and 8 inches or more under a driveway. On top of that goes about 1 inch of coarse bedding sand or clean chip screenings to set the pavers. Deep loose sand as the whole base is the classic mistake: it cannot be compacted to carry load, so the surface ruts and settles within a season. If you need to size the aggregate separately, the gravel calculator converts your base volume into cubic yards and tons, and the cubic yard calculator handles any volume that is not a simple rectangle.

How do you calculate how many pavers you need?

Measure the length and width of the area in feet and multiply them to get square footage. Then work out the coverage of one paver including its joint: add the joint width to the paver's length and width in inches, multiply the two, and divide by 144 to get square feet per paver. Divide the total area by that figure and add a waste allowance for cuts. A 4-inch by 8-inch paver with a 1/8-inch joint covers about 0.233 square feet, so roughly 4.3 pavers per square foot. This calculator does all of it and also returns the base gravel and bedding sand the installation needs.

How many pavers are in a square foot?

It depends on the paver size. A 4-inch by 8-inch paver takes about 4.5 per square foot, a 6-inch by 9-inch about 2.67, an 8-inch by 8-inch about 2.25, a 12-inch by 12-inch exactly 1.0, and a 12-inch by 24-inch about 0.5. Joint width reduces the count slightly because each paver plus its joint occupies more space than the paver alone. Large-format pavers use fewer pieces but demand a flatter, better-compacted base.

How much extra should I order for cuts and breakage?

Order 5 percent extra for a straight running-bond or stack-bond layout, 10 percent for a 45-degree herringbone pattern where every perimeter piece is a diagonal cut, and up to 15 percent for curved or irregular edges. Curves waste more material than the pattern choice does. It is also worth keeping a small number of spares after the job: production runs vary in color, and a later batch rarely matches an existing patio exactly.

How much base gravel and sand do pavers need?

A typical build-up is 4 inches of compacted crusher-run base under a walkway or patio, 8 inches under a residential driveway, and 10 inches or more over poor subgrade or for commercial traffic. On top of the base goes about 1 inch of bedding sand or clean chip screenings. Base aggregate weighs roughly 1.5 tons per cubic yard and bedding sand about 1.35 tons per cubic yard. Add 10 to 20 percent to the base volume for compaction, since aggregate loses volume when it is rolled.

Do I need edge restraint and polymeric sand?

Yes on both counts for almost every installation. Edge restraint runs the full perimeter of the field and is what stops pavers migrating outward under traffic — without it the edges spread and the joints open within a season or two. Polymeric sand fills the joints and hardens to resist washout and weeds; coverage runs roughly 75 to 100 square feet per 50-pound bag for narrow joints, less for wide joints or thick pavers. This calculator returns perimeter linear feet and an estimated bag count for both.

Should I use sand or crusher run under pavers?

Both, in layers, and not interchangeably. Compacted crusher run — a graded mix of stone and fines — is the structural base that carries the load and drains. A thin bedding course of coarse sand or clean chip screenings goes on top of it to set the pavers level. Using deep loose sand as the whole base is the single most common failure: it cannot be compacted to carry load, so the surface ruts and settles. Never use fine mason sand or play sand as bedding.