Patio Calculator

Calculate the number of pavers and cost for a patio. Enter dimensions, paver size, and material cost. Get total area, pavers needed, and estimated cost. Informational only—consult a contractor.

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Published: October 23, 2025 | Updated: October 23, 2025 | Reviewed by: Construction/DIY Editor

Patio Dimensions

Select the shape of your patio.
Choose your preferred units.
Patio length.
Patio width.

Paver Details

Units for paver dimensions.
Length of one paver.
Width of one paver.
Price for one paver.

Sand Base Details

Units for sand base depth.
Depth of sand base layer.
Cost per cubic unit of sand.
Extra material for cuts and breakage (10% typical).

Preset Patios

Rounding Options

Export/Import

How it works

Total Area = Length × Width (for rectangular patios). Number of Pavers = (Area × (1 + Waste%)) / Paver Area. We calculate the total area, add a waste factor, and then determine how many pavers you need to buy.

For circular patios, we use Area = π × (Diameter / 2)². The sand base volume is calculated by multiplying the patio area by the sand depth.

Inputs explained

  • Patio Shape: Select rectangular, L-shaped, or circular based on your patio design.
  • Dimensions: Enter the length and width for rectangular patios, or diameter for circular patios.
  • Paver Details: Specify the size of individual pavers and cost per paver.
  • Sand Base: Enter the depth of the sand base layer and cost per cubic unit.
  • Waste Factor: Extra percentage to account for cutting waste, breakage, and future repairs (10% is typical).

Example

Patio: 6m × 4m = 24 m². Pavers: 20cm × 10cm (0.02 m² per paver), Waste = 10%.

Total Area with Waste = 24 × 1.1 = 26.4 m²

Pavers Needed = 26.4 / 0.02 = 1,320 pavers

If each paver costs $2.50, Paver Cost = 1,320 × $2.50 = $3,300

Sand Base (10cm depth) = 24 m² × 0.1m = 2.4 m³ at $30/m³ = $72

Total Cost = $3,372

Tips & notes

  • Always buy extra pavers for cuts and breakage.
  • A sand base is recommended for proper drainage and stability.
  • Consider edging and jointing sand in your budget.
  • For complex patterns (herringbone, basket weave), increase the waste factor to 15% or more.
  • Compact the sand base thoroughly before laying pavers.
  • Check local regulations for drainage requirements.

FAQs

Calculate the total area and divide by the area of one paver, then add a waste factor. For example, a 24 m² patio with 20cm × 10cm pavers needs (24 × 1.1) / 0.02 = 1,320 pavers.

10% is a common estimate for simple layouts. For complex patterns or diagonal installations, consider 15% or more.

Depends on the depth, but typically 10-15 cm (4-6 inches). Multiply your patio area by the depth to get the volume needed.

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Disclaimer

Informational estimate based on standard calculations. Actual material needs may vary based on patio shape, cutting waste, pattern, and base preparation. Consult a contractor for accurate measurements and quotes.

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