Paver Calculator
Paver counts from the 144-square-inch law — field, waste by pattern, pallets and price on one card each.
Paver Calculator
Results recalculate instantly on every keystroke. Nothing you type is transmitted.
What this result does not account for
- Rectangular fields; curves and bands compute in pieces.
- One module at a time — mixed-course patterns by hand.
- No edge restraint or base pricing on this page.
In short: A 12 × 15 ft patio in 4 × 8 pavers: 180 ft² × 4.5 = 810 field, 891 ordered at 10% — two 510-piece pallets, $1,113.75 at $1.25 each. A 4×8 module is exactly 4.5 per square foot: 144 ÷ 32.
Formula
pavers/ft² = 144 ÷ (L × W in)
field = ft² × pavers/ft²
order = ⌈field × (1 + waste)⌉
pallets = ⌈order ÷ pieces/pallet⌉
[('144', 'square inches in a square foot — the whole law'), ('waste', 'the pattern’s appetite: 5% straight to 15% diagonal'), ('pallet', '100-160 ft² of coverage, supplier-specific'), ('bedding', 'one inch of sand under the field, never deeper')]
Worked Example
- Get pavers per square foot from the 144 law.
- Multiply the field — no cuts, no waste yet.
- Apply the pattern’s waste and ceil to whole pavers.
- Convert to pallets at your supplier’s count.
- Price it, and hand the layers below to the sand page.
The 12 × 15 patio in 4×8s: 4.5/ft² × 180 = 810 field, 891 ordered at 10% running-bond waste, 2 pallets at 510 pieces, $1,113.75 at $1.25. Bedding under it: 0.555556 yd³ by the 324 law.
Strengths & Limits Of This Model
Where this engine is strong
- Exact per-foot law — 4.5 and 1.0 both land clean
- Pattern waste chosen, not padded
- Pallet economics visible before ordering
Where it stops
- No multi-size pattern layouts
- No border or soldier-course count
Practical Use Cases
Patios
Field counts for any module in minutes.
Walkways
Piece orders sized to the pallet.
Pattern choices
Straight vs herringbone, priced in waste.
Pallet orders
Whole-pallet economics made visible.
Quotes
Paver cost separated from base and sand.
Methodology & Editorial Standards
Counts follow the exact 144 law with no joint deduction (joints belong to the sand). Waste is chosen by pattern chip — 5% straight to 15% diagonal — and the order ceils to whole pieces, then to whole pallets at the entered pieces-per-pallet. Cost prices the ORDER, not the field. Bedding volume under the field is reported at the 324 law as a cross-page hand-off.
Computation runs in IEEE-754 double precision at full internal precision; rounding to two decimal places occurs strictly at the display layer, so no cumulative drift enters the result. All monetary outputs use accounting presentation — grouped thousands, two decimals, negatives in parentheses — so figures can be transcribed directly into a model or working paper. Division-by-zero and out-of-domain inputs return an em-dash rather than a misleading number.
This engine was reconciled against an independent reference implementation and hand-verified for the worked example above before release. Our full five-stage review process is published on the About Us page.
Disclaimer. This calculator is provided for informational and modelling purposes only and does not constitute financial, tax, legal, medical, or engineering advice. Verify all figures with a qualified professional before acting on them.
Paver Calculator — 10 Expert FAQs
10 analyst-written answers to the questions practitioners actually ask — optimised for voice and answer-engine retrieval.
How many 4×8 pavers do I need per square foot?
Exactly 4.5. A 4×8 covers 32 square inches and a square foot is 144, so 144 ÷ 32 = 4.5 — 90 pavers per 20 ft² before waste. A 12×12 is exactly 1 per square foot.
How much waste should I add for pavers?
Straight-line runs cut little: 5%. Running bond: about 10%. Herringbone and 45° diagonals cut every course at the edge: 12-15%. The waste is the pattern’s real price — pick the chip that matches the bond, not the hope.
How many pavers are on a pallet?
Typically 480-600 pieces of 4×8 (covering 120-150 ft²), with larger modules running fewer pieces for similar coverage. Pallets usually cover 100-160 ft² — confirm the count on your supplier’s sheet, packaging varies.
How deep should the base be under pavers?
Walkways and patios: 4-6 inches of COMPACTED crushed stone (order with compaction in mind — the gravel page handles the swell). Then one inch of bedding sand, never deeper than 1.5.
Can I lay pavers on just sand?
An inch of bedding sand over compacted base, yes — sand ALONE as the base, no. Sand shifts, ruts and pumps; the compacted stone is what keeps a bed flat for decades.
Do I need edge restraint?
Yes — paver fields creep at the border without it. Spike-in PVC or a concrete restraint holds the sand joints and the pattern tight. It is priced per foot of perimeter, a line this rectangular take-off does not carry.
Is it cheaper to order by pallet or piece?
Pallet, nearly always — piece pricing pays for the handling the pallet skips. Leftover full pavers stack cleanly for years and resell; a short bed by forty pieces stops a job.
What slope should a paver patio have?
A drop of about one inch per 8 feet (roughly 1-2%) away from the house so sheet water leaves the field. The count does not change; the screed rails do.
How do curves change the count?
Curved borders are the diagonal case: every stone at the edge is a cut. Take the area honestly, use the 12-15% waste chips, and expect the bin to fill — the field law itself never changes.
Do joints change the paver count?
No — the 144 law counts face area; joint width moves the POLYMERIC sand instead (30-100 ft² per 50-lb bag by joint and module). Tight joints on 4×8s run 60-75 ft² to the bag.