Calculate pavers, base aggregate and bedding sand for a patio.
Base aggregate is ordered loose but placed compacted, so the volume is increased by a quarter before converting to tonnes. Edge restraint is a perimeter item and is what keeps an interlocking surface from creeping apart. Patio failures are almost always base failures rather than paver failures, which is why base depth and compaction matter more than the pavers chosen.
Paver/Patio
Pavers per m² = 1 ÷ paver face area; base tonnage = volume × 1.6 t/m³
Pavers per m² = 1 ÷ paver face area; base tonnage = volume × 1.6 t/m³ Base aggregate is ordered loose but placed compacted, so the volume is increased by a quarter before converting to tonnes. Edge restraint is a perimeter item and is what keeps an interlocking surface from creeping apart.
Patio failures are almost always base failures rather than paver failures, which is why base depth and compaction matter more than the pavers chosen.
This calculator takes 5 inputs: Patio area, Paver length, Paver width, Compacted base depth, Bedding sand depth. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.