Calculator methodology
The estimator starts with project area, then calculates a compacted aggregate base, a 1 inch bedding sand layer, joint sand coverage, paver count with waste, and perimeter edging. Base and sand quantities include the waste allowance because DIY projects often lose material to compaction, cuts, uneven excavation, and ordering buffers.
Default depths are practical planning defaults: 4 inches of compacted aggregate for many patios and walkways, 6 inches for harsher conditions, and 8 inches as a driveway planning preset. Belgard describes pavers as installed on compacted granular aggregate commonly between 4 and 6 inches deep, with bedding sand at least 1 inch deep. CMHA guidance also describes bedding sand as a nominal 1 inch layer.
Last updated May 18, 2026. This site is a planning aid, not engineering advice. Confirm soil, drainage, frost, base depth, and product coverage with local suppliers, manufacturer instructions, or a contractor.