How this instrument works
Bedding sand is the thin, screeded layer of sand pavers are set into, sitting directly on top of the compacted base and beneath the pavers themselves — distinct from joint sand, which gets swept into the gaps between pavers after they're laid. This calculator computes bedding sand volume from your paved area and depth, then converts that to tons using a density figure, the same volume-to-weight conversion used for any bulk aggregate.
Industry installation guides consistently point to a 1-inch depth as the standard for compacted bedding sand under interlocking pavers — deep enough to allow the pavers to be leveled and settled during compaction, but not so deep that the sand shifts unpredictably under load. Installers commonly use screed rails or pipes to strike this layer to a uniform depth before setting pavers, and it's typically left loose and uncompacted until after the pavers themselves are placed and vibrated down.
Sand density is where real variation enters the calculation: dry concrete or paver-bedding sand typically runs around 1.2-1.5 tons per cubic yard, with 1.35 used here as a reasonable mid-range default. Moisture content and the specific sand's gradation both shift the real figure, so check with your supplier for their product's actual density if you're placing a large order and want a precise tonnage.
- Enter Paved area (sq ft) — the same footprint you're ordering pavers for.
- Enter Bedding sand depth (in) — 1in is the standard compacted-bedding depth used by most interlocking-paver installation guides.
- Enter Sand density (tons/yd³) — check your supplier's actual figure; 1.35 is a typical dry concrete/paver-sand planning default.
- Read Volume (cubic yards) and Sand needed (tons) — the bedding sand quantity to order, separate from joint sand.
Worked example — a 200 sq ft patio, 1in bed
Set Paved area to 200 sq ft, Bedding sand depth to 1in, the standard compacted-bedding depth, and Sand density to 1.35 tons/yd³, a typical dry paver-sand figure. Volume = 200 × (1/12) ÷ 27 = 0.6173 cubic yards. Tons needed = 0.6173 × 1.35 = 0.8333 tons.
A larger 500 sq ft patio at a slightly thicker 1.25in bed, using denser masonry sand at 1.4 tons/yd³, needs 500 × (1.25/12) ÷ 27 = 1.929 cubic yards and 1.929 × 1.4 = 2.701 tons — showing how even a modest depth increase compounds with a denser sand to noticeably raise the total tonnage.
Questions
What's the standard depth for paver bedding sand?
1 inch, compacted, is the depth widely cited across paver installation guides and manufacturer specifications for interlocking concrete pavers — deep enough to allow leveling and settling during compaction, but shallow enough to stay stable under the pavers rather than shifting. Installers commonly use screed guides or pipes to strike this layer to a consistent 1-inch thickness across the whole area before setting pavers into it.
Is bedding sand the same as joint sand?
No — they're two different materials in a paver installation. Bedding sand is the thicker, screeded layer pavers actually sit in, calculated by this tool; the joint material, often polymeric sand, is swept into the narrow gaps between pavers after they're set and compacted, locking them together and resisting weed growth and ant intrusion. That joint fill needs a separate, much smaller volume calculation based on the joint width and depth rather than the full paved area.
Should bedding sand be compacted before laying pavers?
No — bedding sand is typically screeded to a consistent depth and left loose, not compacted, before the pavers go down. The pavers themselves get set into that loose layer and then compacted with a plate compactor afterward, which settles both the pavers and the bedding together into a stable, interlocked surface. Compacting it first can actually make it harder to get pavers to sit level and can reduce the layer's ability to help lock pavers in place.
What kind of sand should I use for paver bedding?
Sharp, angular concrete sand, often specified to a standard like ASTM C33, is the typical choice for paver bedding, since its angular particles interlock and stay in place better than smooth, rounded material like beach or play sand. Using the wrong type can lead to a bedding layer that shifts or settles unevenly over time; check your specific paver manufacturer's installation guide for their recommended specification.
How is bedding sand tonnage different from base gravel tonnage?
They use the same volume-to-weight math, area × depth converted to cubic yards then to tons via density, but they're separate materials with very different depths and densities. Base gravel sits below the bedding sand and is typically several inches deep, providing structural support and drainage, while bedding sand is just the thin 1-inch leveling layer directly under the pavers. Run this calculator, or a gravel-specific one, separately for each layer using that material's own typical depth and density.