Calculate how many slabs you’ll need for your patio and estimate installation and material costs.
Enter your patio size and slab dimensions to work out how many slabs you’ll need (including a 10% allowance for cuts and wastage), your material cost, and an estimated total with installation.
Slab count includes a 10% allowance for cuts and wastage. Material cost = slabs × cost per slab; total adds your optional per-m² installation figure.
Measure your patio length and width in metres.
Enter your slab dimensions in millimetres (e.g. 600 × 600).
Enter the cost per slab, and optionally an installation cost per m².
Click Calculate to see slabs needed and total cost.
This calculator covers slabs and an optional per-m² installation figure — sub-base, jointing compound and edging are usually extra.
This calculator gives a fast estimate, but final prices depend on groundwork, access, edging and finish. For a precise, no-obligation quote, get in touch and we’ll be happy to help.
Divide your patio area by the area of one slab, then add ~10% for cuts and wastage — which this calculator does automatically.
Patios rarely divide into whole slabs, and cuts around edges create offcuts. A 10% allowance covers most layouts.
No – it covers slabs and an optional per-m² installation figure you enter. Sub-base, jointing and edging are extra.
Larger slabs (e.g. 600×600 or 900×600) suit open patios and reduce joints; smaller units suit detailed or curved layouts.
Planning a different project? Explore our full range of free tools on the Calculators Page — each gives an instant estimate from your project size and chosen materials.
