Project Area
Enter either total area directly or site length × width.
Paver Module
Example: 200 mm ≈ 7.87 in
Average joint both ways assumed.
Pattern & Allowances
%
%
Materials
Crushed stone / sub-base layer
kg/m²
Rule-of-thumb; adjust for paver thickness and joints.
Pricing (optional)
₨
₨
₨ pallet price
Results
Calculated using effective module size including joint gap.
| Project area | — | — |
|---|---|---|
| Effective module (L × W) | — | — |
| Blocks per m² | — | |
| Net blocks (no waste) | — | |
| Total waste allowance | — | |
| Total blocks required | — | |
| Pallets required | — | |
| Base volume | — | — |
| Base mass (tonnes) | — | |
| Bedding sand volume | — | — |
| Jointing sand | — | kg |
| Estimated material cost | — | |
| Perimeter (if L×W mode) | — | — |
Tip: Round up blocks and pallets for breakage and spares.
Example data (common sizes, approximate coverage)
| Size (mm) | Joint (mm) | Module (mm) | Blocks/m² | Notes |
|---|---|---|---|---|
| 200 × 100 | 3 | 203 × 103 | ≈ 48.0 | Rectangular, versatile |
| 225 × 112.5 | 3 | 228 × 115.5 | ≈ 38.5 | Imperial brick module |
| 300 × 300 | 3 | 303 × 303 | ≈ 10.9 | Square flags |
Coverage uses module = size + joint both directions.
Formulas used
- Area (m²) = input area, or (length × width) in meters.
- Module length = paver length + joint; module width = paver width + joint.
- Blocks per m² = 1 / (module length × module width).
- Net blocks = area × blocks per m².
- Total blocks = ceil( net blocks × (1 + total waste %) ).
- Base volume (m³) = area × base depth (m).
- Bedding sand (m³) = area × bedding depth (m).
- Jointing sand (kg) = area × coverage (kg/m²).
- Tonnes = base volume × density (t/m³); default density 1.8 t/m³.
Waste % = pattern allowance + extra cuts + edge allowance.
How to use this calculator
- Select your preferred area input method and units.
- Enter paver length, width, thickness, and your typical joint gap.
- Choose a laying pattern and adjust waste allowances.
- Set base and bedding depths; tweak jointing coverage if needed.
- Optionally add prices and pallet details for cost and pallets.
- Click Calculate to update the results table.
- Use Download CSV or Download PDF to export.
Pattern wastage guide
Stack: 0–3% Running: ~5% Basketweave: ~8% Herringbone: ~10%
Typical sizes
200×100×60 225×112.5×60 300×300×50
Layer guidance
Depths vary by soil and load; consult local standards.
Paver coverage by size
| Nominal size (mm) | Module (mm) | Blocks/m² | Per block (m²) |
|---|---|---|---|
| 200 × 100 | 203 × 103 | ≈ 48.0 | ≈ 0.0208 |
| 225 × 112.5 | 228 × 115.5 | ≈ 38.5 | ≈ 0.0260 |
| 300 × 300 | 303 × 303 | ≈ 10.9 | ≈ 0.0917 |
Module assumes a 3 mm joint in both directions.
Suggested layers by application
| Application | Base depth | Bedding depth | Notes |
|---|---|---|---|
| Garden path / patio | 75–100 mm | 25–30 mm | Light duty, well-drained soils |
| Driveway (cars) | 125–150 mm | 30–40 mm | Domestic traffic, typical subgrade |
| Heavy duty / commercial | 150–200+ mm | 35–50 mm | Engineer design recommended |
Depths vary with soil, frost, drainage, and loading.
Pattern efficiency & wastage
| Pattern | Recommended waste | Comments |
|---|---|---|
| Stack bond | 0–3 % | Fast, minimal cuts |
| Running bond | ~5 % | Good interlock, easy setting |
| Basketweave | 6–8 % | Moderate cutting at edges |
| Herringbone | 8–10 % | High interlock, more cutting |
| Random/complex | 10–12 % | Irregular edges, plan extras |
Add edge allowance above pattern waste where needed.