Patio Material Estimator

Estimate the paving slabs, sub-base and sharp sand needed for a patio area.

Patio materials for a 5m by 2.5m area

For a patio measuring 5 metres by 2.5 metres, you will need approximately 39 slabs based on the default slab size, bedding depth and wastage settings shown below.

  • Patio area12.50 m²
  • Slabs needed35 slabs
  • Slabs with wastage39 slabs
  • Sub-base volume1.25 m³
  • Bedding sand volume0.50 m³

Results - Patio Material Estimator

  • Patio area12.50 m²
  • Slabs needed35 slabs
  • Slabs with wastage39 slabs
  • Sub-base volume1.25 m³
  • Bedding sand volume0.50 m³

How this patio estimator works

The calculator works out the total area, estimates slab coverage, then adds wastage. It also estimates sub-base and bedding material from area and chosen depth.

Frequently asked questions

The Patio Material Estimator gives a quick estimate for a project sized at 5m by 2.5m using the default assumptions shown on the page.

For most jobs you will need length and width. The calculator then uses those figures to estimate the materials shown in the results.

Cutting around edges, corners and obstacles can increase waste, so it is usually sensible to order a little extra.

Yes, the calculator is set up for typical UK-style measurements and practical estimating assumptions, but final quantities should still be checked before ordering.

It is designed as a practical planning tool and should be checked against the exact product specification, build method and site conditions before ordering.

Disclaimer

Material quantities shown are estimates for guidance only. Although typical UK wastage and compaction allowances have been included, actual requirements may vary depending on site conditions, installation methods, and material differences. Please confirm quantities with your installer or supplier before ordering. We accept no liability for inaccuracies, financial loss, or delays arising from the use of these estimates.