Metric Unit Calculator
The formula, your substituted values, and the evaluated result are shown below.
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View offerAffiliate link — we may earn a commission at no extra cost to you.Estimate the number of pavers needed from area, unit coverage, and waste allowance.
This is a planning estimate. Confirm dimensions, allowances, material specifications, applicable codes, and supplier requirements before purchasing or construction.
Estimate the number of pavers needed from area, unit coverage, and waste allowance.
The calculator divides the paved area by the area of one paver, adds waste for cuts, and rounds up:
Pavers = round up( area (m²) ÷ paver area (m²) × (1 + waste % ÷ 100) )
Work out the paver area in square metres from its face size. A 230 × 115 mm clay paver is 0.23 × 0.115 = 0.02645 m².
Many suppliers sell by the square metre or by the pallet. Knowing you need 21 m² including waste makes ordering easy.
| Pattern | Suggested waste |
|---|---|
| Stretcher or stack bond, square area | 5% |
| Basket weave | 5–7% |
| Herringbone (90° or 45°) | 10% |
| Curves, circles or many edges | 10–15% |
Pavers rely on the layers under them: - Base: compacted road base, often 75–100 mm for paths and patios and 100–150 mm or more for driveways - Bedding sand: about 20–30 mm, screeded level. Our paver sand calculator covers this. - Edge restraint: a concrete haunch or edging to stop pavers spreading - Jointing sand: swept into the joints after laying
About 37.8 for 230 × 115 mm pavers, 25 for 200 × 200 mm and 11.1 for 300 × 300 mm.
Allow a 20–30 mm layer, which is 0.02–0.03 m³ per square metre of paving.
Not if you want them to last. Pavers need a compacted crushed-rock base and a sand bedding layer to stay level.