How Much Paver Base Do I Need?

Paver base quantity starts with base footprint area × specified compacted depth. Convert inches to feet to obtain cubic feet, then divide by 27 for cubic yards. Tons require the actual material’s bulk density on a basis consistent with the volume being ordered.

The calculator converts a selected design into quantities. It cannot select the structurally adequate depth for unknown soil and traffic; resolve that through the base depth guide before ordering.

Calculate the compacted design volume

Compacted cubic feet = base area in sq ft × compacted depth in inches ÷ 12
Compacted cubic yards = compacted cubic feet ÷ 27

Example design inputs: a 20 × 15-foot base footprint and a project-selected 6-inch compacted layer. The area is 300 sq ft, volume is 300 × 6/12 = 150 cu ft, and compacted volume is 150/27 ≈ 5.556 cu yd. Six inches here is an example input, not a patio recommendation.

Use the finished compacted thickness, not the depth of an uncompacted pile. If thickness varies by section, calculate each area × depth separately. A single average is defensible only when it represents the actual volume distribution.

Find the correct footprint

Base support can extend beyond the paver surface where the restraint or project detail requires it. That increases aggregate area, not paver or bedding area. Measure the specified base boundary independently.

For a rectangular project with the same extension on all sides, expanded area is (length + 2 × extension) × (width + 2 × extension), with all values in feet. Geometry example: a 20 × 15-foot rectangle extended 0.5 ft on every side has a 21 × 16-foot base footprint, or 336 sq ft. Those 36 extra square feet belong only to that assumed detail; 0.5 ft is not a universal extension.

Irregular edges, structural borders and selected-side extensions need their own geometry. Summing every section perimeter can count shared seams twice.

Design volume and order volume answer different questions

Compacted volume describes the layer left in the pavement. Planning order volume is a purchasing estimate that may include a user-selected allowance for handling and the supplier’s loose-to-compacted relationship. An estimating percentage is not a laboratory compaction requirement.

Illustrative chosen allowance: if you select 8% on the 5.556 cu yd example, planning order volume becomes 5.556 × 1.08 = 6.000 cu yd. That arithmetic does not prove that this aggregate will compact by 8%. Confirm the yield basis with the supplier or installer, and keep the unadjusted design volume visible.

Convert to weight only with matching density

US short tons = volume in cubic yards × supplied short tons per cubic yard
Pounds = US short tons × 2,000

A density based on loose delivered aggregate belongs with loose order volume. A compacted dry density belongs with compacted volume and cannot silently replace a loose bulk-density value. Moisture, grading and source change the mass per unit volume. Ask the supplier which condition its quoted conversion describes and confirm whether “tons” means US short tons.

Without density, retain cubic feet and cubic yards and leave weight unspecified. ASTM D2940 is a graded aggregate material specification; it does not provide a universal ton-per-yard conversion or prescribe your base depth.

Round to the supplier’s actual sale increment

Do not assume every quarry sells in half-ton or quarter-yard steps. Obtain the available increment and round the selected purchase quantity once. If ordering by weight, use the weight result; if ordering by volume, use the volume result. They are two sale bases for the same material, not two orders.

Keep a takeoff record with footprint, compacted depth, chosen allowance, density condition and supplier increment. If a design revision changes depth, recalculate both volume and excavation rather than adding an unexplained quantity cushion.

Enter measured base area and selected compacted depth in the Paver Base Calculator. Add supplier density only when available, and confirm purchase increments before converting the estimate into an order.