ToolwickPaver Quantity Calculator: Free Patio Stone Calculator
This paver quantity calculator doubles as a patio stone calculator: enter your patio size, paver dimensions, joint width and waste allowance, and it returns how many pavers to order, always rounded up so you don't come up short.
How to Use This Paver Quantity Calculator
Enter the length and width of your patio, walkway or driveway, then pick a paver size (or type a custom one) and the joint width between stones. Choose your laying pattern to set a waste allowance, or drag the slider yourself. Press Calculate to see how many pavers to order, how many pallets that equals if you entered pallet coverage, and what it will cost if you entered a price per paver. The diagram above redraws with your own dimensions and paver count each time you calculate.
Why This Matters
Paver orders are one of the most expensive "almost right" mistakes in a landscaping project. Pavers are sold by the pallet, often from a specific production lot, and colors vary slightly from batch to batch. If you run short by 30 stones on a 12 × 10 ft patio, the reorder may not match, and a half-finished patio can sit for weeks while you wait. Order too many and you've tied up hundreds of dollars in leftover stone, since many yards will not take back cut or opened pallets.
Homeowners planning a weekend patio use a patio stone calculator to budget before visiting the yard. Contractors use it to write quotes and confirm deliveries. A 6 × 9 in paver covers roughly 0.39 sq ft once joints are included, so even small errors in joint width or waste add up. A 20 × 30 ft driveway apron, for example, needs about 1,546 pavers before waste, which you would round to 1,550 when thinking about it. The difference between a 5% and 15% allowance there is roughly 155 stones, about a pallet.
Use this tool at the planning stage, again when you finalize the design, and once more right before you place the order. Comparing paver sizes in the results table also helps you decide whether large-format slabs, which install faster, are worth the higher price per square foot.
How It's Calculated
The calculator works in square inches internally so that any combination of units gives the same answer. Each paver occupies its own face area plus half of the joint on every side, which is the same as adding one full joint width to both its length and width:
Pavers = ⌈ Net area ÷ ((L + joint) × (W + joint)) × (1 + waste%) ⌉Net area is the patio length times width, minus any area you subtract. The result is rounded up to the next whole paver, never down. Pallets are calculated as ⌈ net area × (1 + waste%) ÷ coverage per pallet ⌉, again rounded up. Metric inputs are converted exactly (1 in = 2.54 cm = 25.4 mm), and the size presets use the true inch dimensions in either unit system.
The waste presets follow common industry rules of thumb: about 5% for a plain rectangle with few cuts, 10% for running bond or basketweave, 15% for herringbone or diagonal layouts, and 20% for curves, circles and heavily cut edges. These are not code requirements, and your own layout, cutting skill and edge restraint may call for more. Base depth, compaction and drainage depend on soil, frost and load; follow the paver manufacturer's instructions and local building rules. For base and bedding sand materials, see the Paver Patio Base & Sand Calculator.
Worked Example
Take a 12 ft × 10 ft patio, 6 × 9 in pavers, 1/8 in (0.125 in) joints, a running bond pattern (10% waste), $1.50 per paver, and pallets covering 100 sq ft.
- Patio area: 12 × 10 = 120 sq ft = 17,280 sq in.
- Paver footprint with joints: (9 + 0.125) × (6 + 0.125) = 55.89 sq in.
- Raw paver count: 17,280 ÷ 55.89 = 309.17, which rounds up to 310 pavers with no waste.
- With 10% waste: 309.17 × 1.10 = 340.09, rounded up to 341 pavers, so 31 extra.
- Pallets: 120 × 1.10 = 132 sq ft ÷ 100 = 1.32, rounded up to 2 pallets.
- Cost: 341 × $1.50 = $511.50.
Those are the same figures the calculator shows when you enter these values.
Tips & Common Mistakes
- Measure the paver, not the label. Nominal sizes such as "6 × 9" can be off by a fraction of an inch. Measure a real stone and use a custom size if it differs.
- Don't forget the joints. If you ignore a 1/8 in joint, you treat each 6 × 9 stone as covering 54 sq in instead of the true 55.89 sq in, so you would order about 3.5% too many. Wider joints and smaller pavers make that error larger.
- Subtract fixed features only once. Deduct planters, fire pits or steps you won't pave, but keep the full area for curved edges, since cuts create waste.
- Keep spares. Hold back a few pavers from the same lot for future repairs. Colors and finishes rarely match later orders.
- Round pallets up and confirm with your supplier. Pallet coverage varies by product and by how the yard counts it. Ask before you pay.
Frequently Asked Questions
How many pavers do I need for a 10x10 patio?
A 100 sq ft patio with 6 × 9 in pavers and 1/8 in joints needs about 258 pavers with no waste. Adding 10% waste brings that to roughly 284. Enter your own numbers above for an exact count.
How much extra should I order for waste?
A common rule of thumb is 5% for simple rectangles, 10% for running bond, 15% for herringbone or diagonal patterns and 20% for curves. Add more if you are a first-time installer or the patio has many corners.
Do joint widths really change the paver count?
Yes. Each joint adds to the footprint of every stone, so wider joints mean fewer pavers per square foot. On small pavers such as 4 × 8 in, a 3/8 in joint instead of 1/8 in lowers the count by about 8.5%, because the footprint grows from 33.5 to 36.6 sq in.
How do I convert pavers to pallets?
Divide your area including waste by the coverage printed on the pallet tag, then round up. Pallet coverage commonly ranges from 80 to 150 sq ft depending on paver thickness and size, so confirm with your supplier.
Does this calculator include base gravel and sand?
No, it covers only the pavers themselves. Base depth varies with soil, climate and traffic, so use the related base and sand calculator and follow manufacturer and local guidance.
Can I use it for walkways and driveways?
Yes. Enter the length and width of any rectangular area, or split an irregular shape into rectangles and add the results. Driveways need a deeper base and a more rigorous edge restraint, which are outside this tool's scope.
Related Tools
Closest to this patio project:
- Paver Patio Base & Sand Calculator – gravel base and bedding sand to go under your pavers.
- Linear Feet to Square Feet Calculator – turn walkway lengths and widths into area.
- Grout Calculator – joint material for tile and stone surfaces.
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