How many pavers do I need for a 10×10 patio?

A 10×10 ft patio (100 sq ft) requires approximately 100 standard 12×12 in pavers before waste. With a 10% waste factor, order 110 pavers. For 16×16 in pavers you would need about 57 (plus waste). Always add at least 10% extra for cuts, breakage, and future repairs.

How deep should the gravel base be under pavers?

For patios and walkways, a 4-inch compacted gravel base is standard. Driveways that carry vehicle traffic should have 6–8 inches of compacted gravel. The base must be well-compacted — at least 95% compaction — to prevent settling and paver movement over time.

How much sand do I need under pavers?

The setting bed of coarse sand should be 1 inch deep before compaction. After compaction the sand is typically 3/4 inch. Use coarse concrete sand (ASTM C33) rather than fine play sand or mason sand — it drains better and compacts more predictably under paver loads.

What is a paver waste factor and why do I need it?

The waste factor accounts for cut pavers at edges, breakage during installation, and extras for future repairs. A 10% waste factor is standard for straight rectangular layouts. Use 15% or more for diagonal, herringbone, or fan patterns that require more cuts. Never skip the waste factor — running short mid-project means costly reorders and potential color-batch mismatches.

What type of sand should I use under pavers?

Use coarse washed concrete sand (ASTM C33) for the setting bed. It has the right particle size distribution to lock pavers in place while still allowing slight adjustment during installation. After laying all pavers, sweep polymeric sand or fine jointing sand into the joints and compact to lock the surface. Avoid using stone dust (screenings) as a setting bed — it can become hard and brittle, preventing proper drainage.

How thick should concrete pavers be?

Standard residential patio and walkway pavers are 2–3/8 inches (60 mm) thick. Pavers intended for driveways or light vehicle traffic should be at least 3–1/8 inches (80 mm) thick. ASTM C936 specifies minimum strength and absorption requirements for solid concrete interlocking paving units used in different applications.

How much does a paver patio cost?

Concrete pavers typically cost $1–$5 per paver for standard sizes, while natural stone like bluestone or travertine ranges from $5–$20 or more per piece. For a 100 sq ft patio, total installed costs including base, sand, and labor range from $800–$2,500 for concrete pavers and $2,000–$6,000+ for premium stone. DIY installation saves significantly on labor.

Paver Calculator — Count, Sand & Gravel

Estimates paver count, sand bed, and gravel base for patios, walkways, and driveways.

What Are Pavers? Types, Materials, and Applications

This paver calculator estimates paver count, base material, and cost for patios, walkways, and driveways. Pavers are individual units of hardscaping material — concrete, clay brick, natural stone, or porcelain — laid on a prepared base to create patios, walkways, driveways, and pool decks. Unlike a poured concrete slab, a paver surface consists of individual interlocking units that can flex slightly under load, resist freeze-thaw cycles without cracking, and be replaced individually if damaged — without disturbing the surrounding area.

Common paver types and their characteristics:

Concrete interlocking pavers (ICPI) — the most popular choice; manufactured to ASTM C936; available in hundreds of colors and shapes; typical residential patio paver is 2-3/8 in (60 mm) thick; driveway pavers are 3-1/8 in (80 mm); $1–$5 per paver at big-box stores
Clay brick pavers — fired clay with natural earth-tone colors that do not fade; harder than concrete; excellent for traditional and colonial aesthetics; $0.50–$3.50 per brick; standard modular brick is 3-5/8 in × 7-5/8 in
Natural stone (bluestone, travertine, flagstone) — unique variations in color and texture; premium appearance; $5–$20+ per piece depending on type and region; irregular shapes require more cuts and skill to install
Porcelain pavers — large-format (12×24 in, 24×24 in) slabs with very low water absorption; frost-proof and stain-resistant; popular for contemporary designs; $4–$12/sq ft; requires diamond blade cutting

The ICPI (Interlocking Concrete Pavement Institute) and ASTM C936 set the industry standards for strength, absorption, and durability. Residential patio pavers must withstand a minimum compressive strength of 8,000 psi — compared to typical residential concrete at 3,000–4,000 psi — making them significantly harder than a standard poured slab.

Standard paver sizes for planning:

4×8 in (10×20 cm) — classic brick format; ~4.5 pavers/sq ft; ideal for driveways and high-traffic areas
6×6 in (15×15 cm) — square format; ~4 pavers/sq ft; versatile for walkways and patios
12×12 in (30×30 cm) — standard square; 1 paver/sq ft; the easiest size to calculate and install
16×16 in (40×40 cm) — larger format; ~0.56 pavers/sq ft; faster installation on large patios

How to Use This Paver Calculator

This paver calculator estimates how many pavers you need, plus the gravel base and sand bed required for a stable, long-lasting installation. Enter your project dimensions and paver size in Step 1, then adjust the base depths, waste factor, and optional paver price in Step 2. The calculator adds the joint width to each paver dimension automatically — so you get an accurate paver pitch that matches real-world spacing. For estimating the gravel base material alone, try our gravel calculator.

How Many Pavers Do I Need?

To calculate paver count, divide the total project area by the effective area of one paver (including joints), then add your waste factor:

Paver count = ⌈Project area (ft²) × waste factor ÷ paver area (ft²)⌉

The effective paver area accounts for both the paver and its joint on two sides, so a 12×12 in paver with a 0.25 in joint has an effective pitch of 12.25×12.25 in — about 1.042 ft² instead of exactly 1 ft². Over a large project that difference adds up to several pavers.

Quick Reference — Pavers Needed per 100 sq ft

12×12 in pavers — ~96 pavers (plus 10% waste = 106)
16×16 in pavers — ~54 pavers (plus 10% waste = 60)
12×6 in pavers — ~192 pavers (plus 10% waste = 212)
24×24 in pavers — ~24 pavers (plus 10% waste = 27)

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Gravel Base and Sand Bed Requirements

A proper paver installation has three layers beneath the paver surface: compacted subgrade soil, a compacted gravel base, and a coarse sand setting bed. Skipping or skimping on any layer causes pavers to settle, shift, or heave.

Gravel base (compacted) — 4 in for patios and walkways; 6–8 in for driveways. Use crushed stone or road base aggregate that compacts well. Our calculator uses 100 lb/ft³ as the compacted gravel density to estimate tonnage.
Coarse sand setting bed — 1 inch of ASTM C33 concrete sand, screeded level before laying pavers. Never use fine play sand or mason sand — they hold water and erode under load.
Jointing sand — swept into joints after installation to lock paver faces. Polymeric sand sets hard and resists weeds and insects; it is not included in this calculator.

Choosing the Right Paver Size and Pattern

Paver size affects both the look and the cost of your project. Larger pavers (16×16 in, 24×24 in) lay faster and require fewer cuts, but are heavier and more expensive per piece. Smaller pavers (4×8 in brick, 6×6 in) allow intricate patterns like herringbone and basket weave but take longer to install.

Common Patterns and Their Waste Factors

Running bond (straight) — 10% waste · easiest to cut and install
Stack bond (grid) — 10% waste · very uniform, cuts along edges only
Herringbone (45°) — 15% waste · strong interlocking, common for driveways
Diagonal / Fan — 15–20% waste · decorative, many angled cuts

For sand estimates, also see our sand calculator, which handles multiple sand types and volume conversions.

Paver Installation Step-by-Step

Excavate — dig to a depth equal to paver thickness + sand depth + gravel depth (typically 7–9 in total for a patio).
Compact subgrade — compact native soil to reduce future settling.
Install gravel base — add crushed stone in 2-inch lifts, compacting each layer to 95% compaction.
Screed sand — spread and level 1 inch of coarse concrete sand using screed pipes as guides.
Lay pavers — set pavers on the sand bed without disturbing the screeded surface. Use the calculated paver count as your order quantity.
Compact pavers — run a plate compactor over the finished surface to seat pavers into the sand.
Sweep jointing sand — sweep polymeric sand into joints, compact again, and mist lightly to activate the binder.

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Paver Cost Estimates

Material costs vary widely by paver type and region. Here are typical ranges to help you budget before getting supplier quotes:

Concrete pavers — $1–$5 per paver; $0.75–$3.50/ft² at standard spacing
Brick pavers — $0.50–$3.50 per brick; $4–$8/ft² installed
Bluestone / natural stone — $5–$20+ per piece; highly regional
Gravel base material — $30–$55 per ton delivered (use our gravel calculator to get tonnage)
Coarse sand (setting bed) — $25–$45 per ton delivered
Professional installation labor — $8–$20/ft² depending on pattern complexity and region

Enter your local paver price in Step 2 above to get a material cost estimate. The calculator multiplies the total paver count (including waste) by your price per paver.

Sources & References

ASTM C936: Standard Specification for Solid Concrete Interlocking Paving Units — ASTM International
ASTM C33: Standard Specification for Concrete Aggregates — ASTM International

Paver Calculator

Area & Paver Size

Base, Sand & Cost

Gravel Base Depth by Use

Paver Formula

Common Paver Sizes