Pflastersteinrechner

To calculate paver quantities, calculate your total project square footage and divide by the square footage of a single paver (including joint spacing). For example, a 10x10 ft patio (100 sq ft) using 4x8 inch pavers (0.222 sq ft each) requires 450 pavers net, or approximately 495 pavers with a 10% cutting allowance.

For simple rectangular patios laid in a running bond or stack bond, add 10% waste. For 45-degree herringbone patterns, circular patios, or walkways with winding curves, order 12% to 15% extra to account for angled edge cuts.

For pedestrian walkways, garden paths, and residential patios, standard depth is 4 inches of compacted crushed gravel base. For driveways and vehicular surfaces, a minimum 6 to 8-inch compacted gravel base is required to prevent rutting and settling.

Apply a uniform 1-inch (2.5 cm) layer of coarse washed concrete sand (ASTM C33) directly over the compacted gravel base. Never exceed 1.5 inches of sand, as excessive sand depth causes pavers to shift and ripple under foot traffic.

Polymeric sand is a blend of fine sand and chemical binders that hardens when activated with water. It locks pavers together, resists erosion, and prevents weed growth and ant infestations. One 50 lb bag covers approximately 75 to 100 square feet.

Yes, edge restraints (such as rigid plastic snap-edge or concrete troweled berms) are critical. Without edge restraints, lateral foot traffic and freeze-thaw cycles push the perimeter pavers outward, causing the entire patio surface to spread and gap.

For a circular patio, calculate area using Area = π × (Diameter ÷ 2)². Multiply the radius by itself and by 3.14159. For example, a 12 ft diameter firepit patio has an area of roughly 113.1 sq ft. When buying standard pavers for circular designs, add at least 15% extra for curved cuts.