Paver Calculator

Pavers for a patio, walk or driveway including joint gap and waste, plus compacted gravel base and bedding sand volumes.

Interlocking pavers are laid with narrow sand-filled joints, typically about 1/16–3/16 in (2–5 mm).
%
About 5% for simple rectangles; 10–15% for herringbone, curves or many cuts.
ICPI minimum: walks 4–6 in, driveways 6–8 in; more on weak or frost-prone soils.
ICPI: screeded bedding sand is nominally 1 in (25 mm) thick.
$per paver
Your rate is remembered on this device.
Pavers needed (incl. waste)
650 pavers
Pavers before waste
618.7 pavers
Area
144
Gravel base (compacted volume)
1.7778
This is the compacted volume. Order extra: loose stone compacts by roughly 10–20%.
Bedding sand
0.444444
Estimated paver cost
$520.00
Excludes base, sand, edge restraint and labor.

Estimate generated with SortedSums: https://sortedsums.com/paver-calculator/. For informational purposes only; verify before relying on it.

Estimate only. This tool is for informational and educational purposes. Results depend on your inputs and simplifying assumptions, and are not a substitute for professional engineering, design or financial advice. Always verify with a qualified professional and applicable codes before purchasing, building or making decisions.

How it’s calculated

Each paver plus its share of the joint covers (length + gap) × (width + gap). The base and bedding layers are simply area × depth.

Pavers = ⌈ area ÷ ((L + gap) × (W + gap)) × (1 + waste%) ⌉ Base volume = area × base depth Sand volume = area × bedding depth

Example: a 12 × 12 ft patio (144 ft²) with 4 × 8 in pavers and ⅛ in joints: each covers 4.125 × 8.125 = 33.52 in² = 0.2328 ft², so 144 ÷ 0.2328 = 618.7 pavers; with 5% waste 650 pavers. A 4 in base is 48 ft³ = 1.78 yd³ and 1 in of sand is 12 ft³ = 0.44 yd³.

The Interlocking Concrete Pavement Institute (now CMHA) recommends at least 4–6 in of compacted aggregate base for walks and 6–8 in for driveways, on a compacted subgrade, with an edge restraint.

Frequently asked questions

How many pavers do I need for 100 square feet?

With 4 × 8 in pavers and ⅛ in joints, about 430 before waste, or roughly 450 with 5% extra.

How deep should a paver base be?

ICPI guidance: at least 4–6 in of compacted aggregate base for patios and walks and 6–8 in for residential driveways, plus about 1 in of bedding sand.

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Sources

Formulas are taken from the free public references above. Results are provided “as is” for informational and educational purposes only. See our disclaimer.

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