Paver Calculator
Count the pavers a patio, path or driveway needs from the area and paver size, with a cutting allowance and the bedding sand.
How many pavers, and how much sand under them.
How the paver calculator works
Each paver plus its joint covers (length + gap) × (width + gap). Divide the area by that, add 5–10% for cuts and breakages, and round up. Bedding sand goes under the pavers at 25–30 mm; the calculator uses 30 mm compacted, on top of whatever road base the ground needs.
A 200 × 100 mm paver with 3 mm joints needs about 48 per square metre; a 400 × 400 mm paver about 6.
Formula: pavers = area ÷ ((length + gap) × (width + gap)) × (1 + waste) · sand = area × 0.03 m
Worked examples
| Inputs | Pavers to buy | Note |
|---|---|---|
| 5 × 4 m, 200 × 100 mm pavers | 1,005 | 1,005 pavers |
| 5 × 4 m, 400 × 400 mm pavers | 130 | 130 pavers |
| 16 × 13 ft, 8 × 4 in pavers | 939 | 939 pavers |
FAQFrequently asked questions
How many pavers per square metre?
About 48 for 200 × 100 mm, 22 for 300 × 300 mm and 6 for 400 × 400 mm, all with 3 mm joints.
How much sand and base do pavers need?
25–30 mm of bedding sand over 75–100 mm of compacted road base for paths and patios; 150 mm or more of base for driveways. Use the gravel calculator for the base.
What allowance should I make for cuts?
5% for a straight or stack bond in a rectangular area; 10% for herringbone, circles or many edges.
Do pavers need jointing sand too?
Yes — fine sand swept into the joints after laying. About 1 kg per square metre for 3 mm joints; more for wider ones.
Where these figures come from
- The Engineering ToolBox — material densities, coverage and unit data — bulk densities, concrete at 2,400 kg/m³, board and sheet sizes
- Brick Development Association — brick sizes and quantities — 215 × 102.5 × 65 mm, 60 bricks per m²
- UK Government — Approved Documents (Building Regulations) — Building Regulations guidance
Last checked: September 2026. Coverage rates and material sizes are typical manufacturer figures — check the product you buy.