🧩 Paver Calculator

What This Calculator Does

This calculator counts pavers. Enter the patio or walkway area and the paver's dimensions in inches, set the waste percentage, and it returns how many pavers to buy. The guidance alongside covers the other two-thirds of a paver order — the compacted gravel base and bedding sand that determine whether the surface stays flat — with the volumes to order for each.

Pavers are the visible purchase, but hardscaping wisdom is nearly all underground: a correctly counted paver order over a correctly built base is a patio for decades; the same pavers over dirt are a maintenance subscription. This page prices both layers honestly.

Counting Pavers Like Tile — Outdoors

The count is area division with outdoor waste. One 12 × 12-inch paver covers a square foot, so 120 sq ft needs 120 before waste; a 4 × 8 brick covers 32 sq in (4.5 per sq ft, so 540 of them); a 16 × 16 slab covers 1.78 sq ft (68 of them). The general formula — (area × 144) ÷ (paver W × H), rounded up, times (1 + waste) — is the same as tiling, and so is the waste logic: every edge ends in a cut, offcuts rarely reuse, and curves and diagonals multiply the cutting. Use 10% for straight rectangles, 15% for curves and patterns.

Two outdoor-specific notes sharpen the order. Multi-size “pattern packs” (mixed slab sizes laid in a repeating module) are bought by the pack's stated coverage rather than per piece — compute the area plus waste and divide by pack coverage. And like tile and wallpaper, pavers vary subtly by production run: order the full quantity at once, and store a few spares permanently, because a stained or cracked paver years later is a five-minute swap with a matching spare and a visible patch without one.

The Section Underneath: Base and Sand

A paver surface is a system: compacted gravel base, bedding sand, pavers, edge restraint, joint sand. The base — 4-6 inches of crushed gravel for patios and walkways, 8-12 for driveways — is compacted in 2-inch lifts and does the actual structural work, spreading loads and draining water so freeze-thaw cannot heave the surface. Its volume is the same math as any fill: area × depth ÷ 27 for cubic yards — a 120 sq ft patio at 4 inches needs 1.5 yards of base gravel, which usually outweighs the pavers themselves.

Over the compacted base goes exactly 1 inch of bedding sand, screeded flat — thicker sand feels generous and creates the wavy settling it seems to prevent (a 120 sq ft patio needs just 10 cubic feet, about a third of a yard). After the pavers are laid and compacted, joint sand (polymeric, which hardens against weeds and washout, is the modern default) sweeps into the gaps, and edge restraint — spiked plastic or concrete edging — locks the field so it cannot creep outward. Every failure mode of a paver patio maps to one skipped element of that list, which is why the list is short and non-negotiable.

Layout, Slope, and Doing It Once

Good installs are planned flat on paper first. Slope the surface away from the house at about 1/4 inch per foot (a 12-ft-deep patio finishes 3 inches lower at its outer edge) so rain leaves; set finished height against door thresholds and existing walks before digging, since the excavation is finished height minus the full section (pavers + sand + base) — typically 7-9 inches of digging that surprises first-timers. Dry-lay a starter row to check the pattern against the space, and begin square from the longest fixed edge; sliver cuts at a visible edge can often be avoided by shifting the field half a paver, exactly as with tile.

Rental compactors do in minutes what hand tampers do poorly in hours — compact the base in lifts and run the plate over the finished pavers (with a pad) to seat them into the bedding sand before jointing. Utility location before digging is the same free call as any excavation. None of this changes the shopping list this calculator produces; it is the sequence that makes the list turn into the patio in the picture — once, without the annual releveling that skipped bases quietly promise.

Quick Tips

• Pavers = (area × 144) ÷ (W × H inches) + 10-15% waste; keep spares.
• Section: 4-6″ compacted gravel base, exactly 1″ bedding sand, pavers, edge restraint.
• Slope away from the house ~1/4″ per foot; plan finished height before digging.
• Most paver failures are base failures — the digging is the job.

Frequently Asked Questions

How many pavers do I need?

Divide the area by one paver's area and add waste: 120 sq ft of 12 x 12-inch pavers (1 sq ft each) with 10% waste is 132 pavers. The calculator handles any paver size in inches — 4x8 bricks, 16x16 slabs, and everything between.

How much base and sand goes under pavers?

The standard patio section: 4-6 inches of compacted gravel base (more for driveways), 1 inch of bedding sand, then the pavers. The base does the structural work — most paver failures are base failures.

How much waste should I add for pavers?

10% for simple rectangular layouts, 15% for curves, circles, and diagonal patterns where edge cuts multiply. Cut pavers rarely yield a usable second piece, and matching a discontinued paver later is as hard as matching tile.

Can I lay pavers straight on dirt or sand alone?

It works briefly and fails predictably: without a compacted base, pavers settle unevenly, rock, and heave with seasons. The gravel-plus-sand section exists because soil moves; skipping it trades a weekend of digging now for a wavy patio every year after.

The Whole Section, Free to Use

This calculator runs entirely in your browser, counting pavers and sizing the layers the moment you type. It needs no account or download and works on any device. Like every tool here, it is free to use as often as you like.

Related Tools

For the layers beneath, the gravel calculator sizes the base, the tile calculator handles the indoor cousin, and the square footage calculator measures the patio first.