The base is calculated a little wider than the pavers, because it should extend past the edges so the edge restraint sits on solid ground.
How the paver calculator works
PaverCalc finds the area of the rectangle (length × width), circle (π × radius²) or the area you enter, then multiplies it by the pavers per square foot, 144 ÷ ((paver length + joint) × (paver width + joint)), and adds your waste allowance, rounding up to whole pavers.
The base area is the paver area extended by the base extension on every side. Base volume = base area × depth, plus the compaction allowance, converted to tons with the density you set. Bedding sand = paver area × sand depth. Joint sand bags = area ÷ coverage per bag. Edge restraint = the perimeter.
Pavers per square foot
| Paver (inches) | Pavers per sq ft | Sq ft per paver |
|---|---|---|
| 4×8 brick paver | 4.5 | 0.22 |
| 6×6 | 4 | 0.25 |
| 6×9 | 2.67 | 0.38 |
| 6×12 | 2 | 0.5 |
| 12×12 | 1 | 1 |
| 12×24 | 0.5 | 2 |
| 16×16 | 0.56 | 1.78 |
| 24×24 | 0.25 | 4 |
Typical layers (ICPI guidance)
| Layer | Patio / walkway | Driveway |
|---|---|---|
| Compacted aggregate base | 4″ minimum | 6″ minimum |
| Bedding sand | 1″ nominal | 1″ nominal |
| Paver thickness | 2⅜″ (60 mm) or more | 2⅜″ (60 mm) or more; herringbone pattern |
| Base past the edges | 6″ or more | 6″ or more |
Base and sand guidance from the Interlocking Concrete Pavement Institute (ICPI) for well-drained soils; use a thicker base on clay, wet or frost-prone ground. Densities (about 1.4 tons/yd³ for crushed base, 1.3 for sand) and joint-sand coverage are typical figures, so results are estimates: confirm with your supplier and the bag label, and call 811 (US) before you dig.
Frequently asked questions
How many pavers do I need for a 12 × 16 patio?
192 sq ft × 4.5 pavers per sq ft = 864 standard 4 × 8 pavers, or about 951 with 10% extra for cuts.
How much extra should I order?
About 5% for straight patterns with few cuts, 10% for a typical patio and 15% for herringbone, diagonal layouts or curves.
What goes under pavers?
Compacted crushed-stone base, then about 1 inch of coarse bedding sand. Joint sand is swept in after the pavers are laid.
Is PaverCalc free?
Yes, with no sign-up or ads.
Are my measurements saved?
Yes, in this browser only.