Waste & optimization

Paving waste factor calculator

The more irregular the surface, the more pavers need cutting at the edges. The planner shows stone by stone where cuts happen. The optimizer then reduces them by changing the joint width or the area size slightly.

What the planner shows

  • Cuts stone by stone, not just a flat percentage.
  • The joint width that leaves the fewest cuts.
  • How much a few millimetres of area change reduce the cut count.

How to start

  • Draw your surface and pick paver and pattern.
  • The shopping list shows how many pavers stay whole and how many get cut.
  • Open the optimizer and apply the option with the fewest cuts.

FAQ

How much waste is normal?

On rectangular surfaces with a suitable pattern, often only 3 to 5%. Angled edges or herringbone can push it to 10 to 15%. The planner shows the exact cut count for your surface.

Is the optimizer worth it?

Usually. Changing the joint by 1 to 2 mm, or the area by a few millimetres, can halve the cuts without anyone noticing the difference.

Key figures for this scenario

The figures come from the same formulas the planner uses. They leave out joints and waste; the planner's shopping list adds both for your surface shape.

Paver format
Standard rectangular paver (200x100 mm)
Laying pattern
Running bond
Pavers per m²
50
Load class
Pedestrian
Base layer
20 cm crushed stone 0/32 mm
Bedding layer
4 cm grit 2/5 mm
Excavation depth
30 cm

Example: a 20 m² surface

For 20 m² you need about 1,000 pavers, 4.8 m³ of crushed stone (about 8.16 t, including a 20% compaction reserve) and 0.8 m³ of grit (about 1.2 t). Dig about 30 cm deep: 20 cm of base, 4 cm of bedding and 6 cm of paver.

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