Calculate a paver patio using area, purchase packages and subbase layers
A rectangular paver patio needs more than enough paving units to cover its visible surface. Most designs include a prepared base, bedding course and edge restraints, and each element is measured differently. The patio calculator keeps the finished surface area distinct from the volume beneath it, so a six-inch gravel base is not mistakenly treated as six feet of added excavation.
Measure patio length and width, enter the expected compacted thickness of the granular base and bedding sand, and use the paver product's coverage per complete box. Purchase quantities round upward after applying the chosen cutting allowance. Base and bedding are shown as geometric compacted cubic yards; the conversion to loose tons or delivery yards depends on supplier density, moisture and compaction, so it should be confirmed before ordering.
Paver boxes, aggregate volumes and installed edge length
Whole paver boxes = ceiling[patio area × (1 + cutting allowance ÷ 100) ÷ box coverage]
Compacted base (cu yd) = patio area × base thickness (in) ÷ 12 ÷ 27
Compacted bedding (cu yd) = patio area × bedding thickness (in) ÷ 12 ÷ 27
Rectangular perimeter (ft) = 2 × (length + width)
Worked example: an 18 by 12 foot paver patio
An 18-by-12-foot patio covers 216 square feet. A 10% allowance brings the paver purchase target to 237.6 square feet. With boxes covering 12 square feet apiece, the calculation rounds 19.8 boxes to 20 complete boxes, supplying 240 square feet in total.
At a compacted six-inch base thickness, the geometric base volume is 216 × 0.5 ÷ 27 = 4 cubic yards. A one-inch bedding layer occupies roughly 0.67 cubic yard. The outside perimeter is 60 feet, so a fully restrained rectangular edge requires about 60 linear feet before openings, fixed walls or special edge details are considered.
Distinguish compacted material quantities from delivered aggregate
The gravel base and bedding volume results represent the shape of the finished layers after installation. Aggregate ordered from a yard is often sold in loose cubic yards or by weight. Compaction, grading, over-excavation and the aggregate type alter the delivery quantity. Price each unit with the supplier's actual selling basis rather than applying a loose-yard price directly to compacted geometric volume without conversion.
Drainage away from structures, frost conditions, soil bearing, excavation depth, retaining edges and accessibility may require a different section from the dimensions entered here. The calculator also assumes rectangular boundaries and a single paver coverage value; curves, borders and patterned layouts need a separate cutting allowance or detailed takeoff. Concrete slabs and poured patios require different quantities and should not be priced from this paver model.
Paver patio quantity questions
Does the paver waste allowance increase the gravel base volume?
No. Waste affects only the number of paver boxes ordered. Gravel and bedding volumes are based on installed patio area and the chosen compacted layer depths. Each purchase category has its own measurement basis.
Why can I order more paver coverage than the patio area?
Pavers are rounded to whole boxes after the cutting allowance is added. The resulting coverage may be greater than required because unopened packs or usable spare units cannot always be purchased in fractions.
Can the calculator determine the correct gravel base depth?
No. It measures the layer depth you specify. Appropriate excavation and base thickness depend on subgrade, expected loading, climate, drainage and the paving system selected.