Landscape Rock Calculator
Tons and cost of rock or gravel for any area and depth, by material density.
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Patio Paver Calculator
Number of pavers, bedding sand, and material cost for a rectangular patio by paver size, with a waste allowance.
Patio Paver Calculator
Chlorova · updated for 2026
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Click “Calculate” to see your results.
This counts pavers for one flat rectangle plus a waste allowance, and it does not model a curved or angled patio, a fire pit cut-out, or the border and edge pieces that most designs use. The bedding sand assumes a level one-inch layer and leaves out the base gravel, polymeric sand, and any compaction shrink. Real pavers are sold by the piece or the square-meter pallet, so round your order up to full pallets, and confirm the exact face dimensions against the product you buy, since a paver bedded with joints takes slightly more area than bare geometry suggests.
A patio bought short of pavers means a half-laid floor and a return trip, while one bought careless on size wastes money on cutting. This patio paver calculator turns the length and width of your rectangle into the exact paver count at your chosen size, the bedding sand to lay them on, and a material cost with a sensible waste allowance built in. Pick six-, twelve-, sixteen-, or twenty-four-inch pavers, enter the patio size, and the whole order is settled before the first course is set.
Counting Pavers in a Few Steps
- Choose the paver size so the tool loads its pieces-per-foot count and unit price.
- Enter the length and the width of the flat patio surface you want to lay.
- Set a sensible waste allowance, since edge and cut pieces always end up used.
- Read the total square footage of the paved patio surface you are covering.
- Check how many whole pavers the bare area plus that waste will need.
- Note the bedding-sand volume required for a level one-inch laying bed.
- See the total paver cost so you can set a real material budget for the job.
How the Paver Count Is Worked Out
The paved area is simply length times width, and each paver size carries a fixed count per square foot, so the bare number of pavers is that area multiplied by the per-foot count for the size you chose. The waste allowance then scales the whole count up by a percentage, rounding to a whole paver, because you buy pieces, not fractions of them.
Cost is just that rounded paver count times the price each, and the bedding sand is the area divided by twelve, the cubic feet in a one-inch layer laid across the whole floor. The paver picker supplies the two numbers that matter, a per-square-foot count and a per-paver price, which is why one area quietly drives the piece count, the sand, and the bill together. Larger slabs lower the piece count but raise the price each, so the total rarely falls as much as the count does.
Worked Example: A Twelve by Ten Patio in Twelve-Inch Pavers
- You are laying out a flat rectangular patio twelve feet long by ten feet wide.
- Standard twelve-inch pavers set exactly one paver in each square foot.
- The bare paved area is therefore a plain 12 × 10 = 120 square feet.
- A ten percent waste allowance covers the inevitable edge and cut pieces.
- So the pavers needed rise to ceil(120 × 1 × 1.10) = 132 whole pavers.
- At two dollars fifty each, those pavers cost 132 × $2.50 = $330.
- The one-inch bedding sand works out to 120 ÷ 12 = 10 cubic feet.
- Order full pallets, since a loose count of 132 may not match a pack.
Paver Sizes Compared
Pieces per square foot for each offered size and the bare count for a one-hundred-twenty-square-foot patio without waste, matching the figures the picker applies. Change the size in the calculator and the count, cost, and effort all re-solve off that one per-foot number.
| Paver size | Per sq ft | 120 sq ft patio |
|---|---|---|
| 6 × 6 in | 4 | 480 pavers |
| 12 × 12 in | 1 | 120 pavers |
| 16 × 16 in | 0.56 | 68 pavers |
| 24 × 24 in | 0.25 | 30 pavers |
Key Terms
- Paver
- A precast concrete or stone block laid to form a hard, walkable patio surface.
- Bedding sand
- The thin one-inch layer of sharp sand pavers are set into to sit level and true.
- Waste allowance
- Extra pavers bought to cover cuts, breaks, and edge pieces, usually around ten percent.
- Course
- One straight row of pavers across the patio, laid and leveled one at a time.
- Polymeric sand
- Sand mixed with a binder that hardens in the joints to lock pavers and stop weeds.
Laying a Patio That Stays Flat
- Order by the pallet, not the piece, since paver counts round to full packs and a short load means an exact-color match you can no longer buy.
- Bigger slabs cut the piece count but barely cut the cost, because price per paver climbs right back up, so weigh laying time against money.
- Always add waste before you buy, since edge cuts and a few cracked pieces quietly eat ten or fifteen percent of any clean rectangular count.
- The bedding sand is only a one-inch bed, so the real dig is the compacted gravel base beneath it, which this estimate deliberately leaves out.
- Lay pavers with joints even on a grid, because a hairline gap absorbs shifting, and a tight butt-joint pops up the first hard freeze.
Common Mistakes & Fixes
- Buying the exact rectangle count with no waste, then running short at the borders and corners.
- Confusing nominal with actual paver size, so jointed courses take more area than the bare math says.
- Skipping the compacted gravel base and letting a level-looking patio sink within a season.
- Choosing huge slabs to save money and finding the price per paver quietly erases the gain.
- Ordering loose pieces, then facing a mismatched color batch when a mid-job top-up is needed.
When to Use This (and When Not To)
Use it to size a simple flat rectangular patio, walkway pad, or shed floor, when you want the paver count, bedding sand, and a material cost before you dig. It counts pavers for one rectangle, not a curved or multi-level design, so break an odd shape into rectangles and add each. For a mulched or gravel path rather than solid pavers, the landscape rock calculator sizes loose material, and the garden area calculator finds the footprint when you only need square footage.
Patio Paver Calculator: Frequently Asked Questions
How many pavers do I need for a patio?
Multiply the patio's square footage by the number of pavers per square foot for your size, then add a waste allowance of about ten percent. A 120 square foot patio in twelve-inch pavers needs 120 pieces plus waste, which rounds up to roughly 132 pavers to buy.
How much waste should I order for pavers?
Ten percent is a sound default for a plain rectangle, and curved or patterned patios want fifteen or twenty. Cutting edge pieces and a few cracked pavers always consume more than the flat area, so a slightly short order costs you a second, mismatched trip.
Are bigger pavers cheaper?
Not usually, because a larger paver covers more area yet costs more each, so the money barely moves even as the piece count drops. The real saving in big slabs is laying time and fewer cuts, not the purchase price, which the calculator shows side by side.
How much bedding sand do I need?
A one-inch bed over the whole area is the paved square footage divided by twelve, so a 120 square foot patio takes about ten cubic feet of sand. That is the leveling bed only, not the compacted gravel base you dig and pack beneath it.
Does this count the gravel base or edging?
No, it prices the pavers, a one-inch bedding sand layer, and nothing else, so your base aggregate, polymeric joint sand, and retaining edge are separate lines. Budget those apart, because a proper base often costs as much as the pavers themselves on a small patio.
Can I use it for a curved or L-shaped patio?
Only by splitting the shape into rectangles, since each run assumes one flat four-sided floor. Work out the paver count and cost for every rectangle, add them together, and round the total up to full pallets for the finished order.
Sources & Further Reading
- Estimating Materials for Paver Patios — University of Minnesota Extension. Basis for the paver-count, waste, and bedding-sand math used here.
- Base Preparation and Paver Installation — Interlocking Pavement Layered Systems guidance via Cornell Cooperative Extension. Underpins the base-layer and joint cautions on this page.
- Choosing Paver Sizes for Walkways and Patios — Penn State Extension. Source of the size-versus-cost and laying-effort trade-offs in this calculator.
Chlorova Gardening Team
Builds, checks and documents every tool we publish
Chlorova editorial review
Checked against extension-service publications
Formula verified against published references · Updated
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