How many pavers do I need for a patio?

Multiply your patio's length by width to get the area, add a waste factor (10% for a straight pattern, 15%+ for herringbone or diagonal layouts), then divide by the coverage of a single paver. A 16×12 ft patio with 12×12 in pavers needs about 212 pavers after waste.

How deep should the compacted base be under pavers?

A standard residential patio uses about 4 inches of compacted base (crushed stone/road base) under a 1-inch sand setting bed. Driveways or areas with vehicle traffic need a deeper base, typically 6-8 inches, and heavier clay soils may need extra depth for drainage.

Why does the base material calculation include a 20% compaction allowance?

Crushed stone base material compacts by roughly 20% once it's tamped down — a 4-inch compacted layer typically requires close to 4.8 inches of loose material before compaction. Ordering only the compacted volume leaves you short once the base is actually tamped.

What's the sand setting bed for, and how deep should it be?

The sand setting bed is a thin, screeded layer (typically 1 inch) that sits on top of the compacted base and gives pavers a flat, level surface to sit on. It's not compacted the way the base layer is — it's screeded flat with a straight edge before pavers are laid.

What is polymeric (jointing) sand for?

Polymeric sand is swept into the gaps between pavers after installation and hardens when activated with water, locking the pavers together and helping resist weed growth and ant intrusion. Coverage varies by joint width and paver size — this calculator uses a standard estimate of one 50 lb bag per about 80 sq ft.

Do I need edge restraint around a paver patio?

Yes, in almost all cases. Edge restraint (plastic, metal, or paver-set-in-concrete edging) holds the perimeter pavers in place and prevents the whole patio from spreading or shifting over time under foot traffic and freeze-thaw cycles.

Straight pattern vs. herringbone — why does it change the waste factor?

A straight running-bond pattern lines pavers up in simple rows, producing clean, minimal cuts at the edges. Herringbone and other diagonal patterns interlock at an angle, which looks great and interlocks more strongly under load, but produces more angled offcuts along every edge — hence the higher recommended waste factor.

How much does a paver patio cost?

This calculator estimates paver cost only (paver count × price per paver); base material, sand, jointing sand, edging, and labor (if hiring a contractor) are priced separately and vary significantly by region and material choice.

Is my data stored anywhere?

No. All calculations run locally in your browser using standard JavaScript arithmetic. Nothing you enter is transmitted to a server or stored.

AI Insights

Paver / Patio Calculator

Find how many pavers your patio needs, plus compacted base, sand, edging, and jointing sand, with cost.

Last updated August 3, 2026

Units

Patio length (ft)

Patio width (ft)

Paver size

Laying pattern

Waste factor (%)

Estimate base, sand, edging & jointing sand

Compacted base depth (in)

Sand setting bed depth (in)

Estimate cost

Pavers needed

212 pavers

211.2 exact — buy 212 to cover waste

Patio area

192.0 sq ft

Total coverage bought

212.0 sq ft

Base material to order

2.84 cu yd

2.37 cu yd compacted

Sand setting bed

0.59 cu yd

Jointing sand

3 bags

~50 lb bags

Edge restraint

56.0 ft

~56 spikes

At this scale, renting a motorized plate compactor is well worth the small daily fee compared to hand-tamping the base material. A medium layout gives you enough square footage that edge cuts will take up a surprising amount of your time, so rent a wet saw to speed up the trimming process and keep your lines looking sharp. Budget a solid weekend for the job, giving yourself Saturday for digging and base prep and Sunday for laying pavers and locking in the edge restraints.

AI-generated insight

How to use the paver calculator

1
Enter your patio's length and width in feet or meters.
2
Choose a paver size (or enter a custom one) and a laying pattern, which sets a sensible default waste factor.
3
Turn on base, sand & edging to size the compacted base, sand setting bed, jointing sand, and edge restraint, and optionally turn on cost.
4
Your paver count and all supporting materials appear instantly and update as you adjust any field.

How paver quantities are calculated

A paver patio is built in layers: compacted subgrade, compacted base, a sand setting bed, then pavers with jointing sand swept into the seams.

A paver patio is really two estimates layered on top of each other: the pavers themselves, and the base structure that keeps them flat and stable for years. Here's exactly how the calculator arrives at each number:

Patio area = length × width
Area with waste = area × (1 + waste factor)
Pavers needed = area with waste ÷ paver coverage, rounded up
Compacted base volume = area × base depth ÷ 27 (cubic yards)
Base material to order = compacted volume × 1.2 (accounts for ~20% compaction)
Sand setting bed volume = area × sand depth ÷ 27 (cubic yards)

Worked example: A 16 ft × 12 ft patio is 192 sq ft. With a 10% waste factor for a straight pattern, that's 211.2 sq ft to cover. At 1 sq ft per 12×12 in paver, you'd need 211.2 ÷ 1 = 211.2 pavers — rounded up to 212. For the base, 192 sq ft at a 4-inch (0.33 ft) compacted depth is 192 × 0.33 ÷ 27 ≈ 2.37 cubic yards compacted, so you'd order about 2.37 × 1.2 ≈ 2.85 cubic yards of loose base material to allow for compaction.

Paver size and base material reference

Paver size	Coverage	Best for
6 × 6 in	0.25 sq ft	Intricate patterns, curves, borders
6 × 9 in	0.375 sq ft	Classic patio, walkways
12 × 12 in	1 sq ft	Most patios; simple math, fast install
16 × 16 in	1.78 sq ft	Large open patios, fewer joints

Layer	Typical depth	Notes
Compacted base	4 in (patio), 6-8 in (driveway)	Crushed stone, compacted in lifts
Sand setting bed	1 in	Screeded flat, not compacted
Jointing sand	Fills joint gaps	~1 bag (50 lb) per 80 sq ft

Tips for a patio that lasts

Compact the base in layers ("lifts") of no more than 2 inches at a time rather than dumping the full depth and compacting once — a plate compactor can't fully densify a thick, loose layer in a single pass, and a poorly compacted base is the single biggest cause of pavers settling or shifting later.

Slope the patio slightly away from your house — a common standard is about a 1-2% grade (roughly 1/4 inch of drop per foot) — so rainwater drains off the surface instead of pooling against your foundation.

It's almost always worth rounding up to the next full paver and keeping a few spares after the job — matching a discontinued color or batch later can be difficult if you need to replace a cracked paver down the road.

Planning the base layer under your patio? Our Gravel Calculator can help you price out the crushed stone by the ton if you're sourcing it separately from a bulk supplier.

Building a wood deck instead of a paver patio? Try the Deck Material Calculator →

Patio isn't a simple rectangle? Total an L-shape, circle, or triangle first in the Square Footage / Area Calculator →

Frequently asked questions

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