Patio & Walkway Paver Calculator (Pavers, Base Gravel, Bedding Sand

Hardscaping & Masonry: The Anatomy of a Long-Lasting Paver Patio

A professionally installed paver patio lasts 30 to 50+ years without sinking or shifting when constructed with proper stratified layers.

The 4 Critical Construction Layers

• Excavated Soil Subgrade: Compacted native soil sloped away from foundations at 1/4" per foot for drainage.

• Crushed Gravel Sub-Base: 4" minimum for patios, 8" for driveways, compacted in 2" lifts.

• Bedding Sand (Coarse Concrete Sand - ASTM C33): Screeded uncompacted at exactly 1.0 inch depth (never use fine play sand).

• Pavers & Polymeric Sand: Set pavers, vibrate with plate compactor, sweep polymeric joint sand into joints, and mist with water to activate binder.

How to Use This Calculator

Enter your Project Length (Feet) (e.g. 20), Project Width (Feet) (e.g. 15), Paver Size / Dimensions — choose from 4" × 8" Standard Brick Paver (0.222 sq ft), 6" × 6" Square Paver (0.250 sq ft), 6" × 9" Cobble Paver (0.375 sq ft), Crushed Gravel Sub-Base Depth — choose from 4 inches (Standard Walkway / Patio - Pedestrian), 6 inches (Heavy Patio / Fire Pit Area), 8 inches (Driveway / Heavy Vehicle Load), Waste & Cut Allowance (%) — choose from 5% (Simple Rectangular Layout / Running Bond), 10% (Standard / Herringbone / Basketweave), 15% (Curved Edges / Diagonal 45° Pattern), and Paver Material Cost ( per sq ft) (e.g. 4.50). Measure twice before entering dimensions — small measurement errors scale up significantly in material estimates.

The Formula

Hardscaping material estimation formulas: Pavers Needed = (Length (ft) × Width (ft) × (1 + Waste)\%) / (Paver Area (sq ft)) Sub-Base (cu yds) = (Area (sq ft) × (Gravel Depth (in)) / (12)) / (27) × 1.15 (compaction factor) Sand (cu yds) = (Area (sq ft) × (1 in) / (12)) / (27) × 1.05 Edge Restraints (linear ft) = 2 × (Length + Width)

Worked Example

For example, building a 20 ft × 15 ft (300 sq ft) patio using 4" × 8" standard brick pavers with a 4" gravel sub-base and 10% waste allowance: Total area is 330.0 sq ft. Total pavers needed is . Requires 4.26 cubic yards (5.96 tons) of crushed gravel base, 1.02 cubic yards (1.38 tons) of 1" bedding sand, 4 bags of 50-lb polymeric joint sand, and 70 linear feet of edge restraint border.

Understanding Your Result

Construction estimates are starting points — site conditions, material specifications, and local code requirements will affect final quantities and costs. Always obtain at least three contractor bids for major projects. Local building departments can confirm permit requirements and inspection milestones. Add waste factors appropriate to the material type and complexity: 10% for simple rectangular shapes, 15–20% for complex geometries or custom cuts.