How Much Sand Do I Need Under Pavers?

Bedding sand quantity is paved area × selected bedding depth. Calculate volume first. Convert that volume to weight only with supplied bulk density, and to bags only with both density and actual package weight. Joint sand is a separate quantity.

Use the bedding footprint

Measure the area receiving pavers, including applicable border courses and excluding openings. A base extension outside the pavers does not automatically receive bedding sand. Do not use the whole excavation footprint if some of it is for restraints, drainage or working room.

For multiple sections, add the nonoverlapping paved areas. Separate any section using a different bedding material or layer thickness.

Convert the layer into cubic feet and yards

Bedding cubic feet = paved sq ft × depth in inches ÷ 12
Bedding cubic yards = cubic feet ÷ 27

CMHA PAV-TEC-002 describes a nominal 1-inch (25 mm) bed screeded loose for its conventional sand-set method. Use that guidance only where the assembly applies. It is not an ASTM C33 depth requirement or a universal layer for panels, permeable paving and rigid overlays.

Worked example: for 300 sq ft and a nominal 1-inch loose screed, volume is 300/12 = 25 cu ft, or 25/27 ≈ 0.926 cu yd. This is nominal screeded volume before any chosen purchase allowance. It is not the same as a specified final compacted bedding thickness.

Add a chosen order allowance once

An allowance can account for planned handling loss and installation needs. It must be selected for the project; it is not a mandatory standard percentage. Illustrative choice: adding 4% to the example produces 25 × 1.04 = 26 cu ft, or approximately 0.963 cu yd.

Do not use an allowance to finance a deliberately uneven bedding layer. Correct the base grading so the selected depth remains consistent; see sand depth under pavers.

Weight needs a density on the right basis

US short tons = planning order cubic yards × supplier short tons per cubic yard
Pounds = short tons × 2,000

Ask whether density describes loose sand at its expected delivery moisture. Particle density and compacted dry density are different quantities from delivered bulk density. ASTM C33 concerns aggregate grading and quality, not a universal number of tons in a yard.

Without this information, use cubic feet or yards and leave weight unspecified. Do not silently multiply by a familiar density from another supplier or material.

Bags need actual package information

Whole bags = round up [estimated pounds ÷ package pounds]

Illustrative purchasing inputs only: if the supplier identifies the example’s selected volume as 1,080 lb and the selected package contains 40 lb, the estimate is 27 bags. The supplied weight and 40 lb package are example data, not defaults. With only bag weight and no density or yield information, a weight-based volume conversion remains incomplete.

Some packages report a usable volume or layer coverage instead. Verify that value and its depth basis with the supplier; do not combine it with an unrelated weight conversion. Keep package rounding and a selected allowance from being counted twice.

Keep the order lines distinct

Order bedding, jointing material and base aggregate as separate products. If changing pavement systems, revisit material and depth rather than reusing a sand estimate made for the previous assembly. The material guide helps identify what belongs under your units.

Use the Paver Sand Calculator with measured paved area and the chosen screeded depth. Leave density and package fields empty until supplier data is available; volume remains useful without them.