Hardscaping
Patios and walls: paver count from the patio area and the paver face size (plus waste), paver-patio cost, retaining-wall block count from the wall face area, retaining-wall cost, polymeric-sand bags for the joints, and the gravel base and bedding sand under the pavers. Coverage is a labeled typical — confirm on the product. ⚠️ Walls over about 3–4 ft usually need an engineer and a permit.
Planning estimate: this is a planning estimate. Coverage varies by product (bag size, compaction, waste, slope and how tightly you pack). Buy about 5–10% extra and confirm the coverage printed on the product before you order.
Engineer & permit for tall walls: Retaining walls taller than about 3–4 ft (or holding a surcharge/slope) usually need an engineer's design and a permit. Confirm height limits and drainage with your local building department.
Paver CountHow many pavers do you need? Enter your patio area, choose a paver size and a waste factor, and get an exact paver count with the formula and a worked example.Paver Patio CostEstimate paver patio cost from your own price per square foot, base prep and a contingency buffer. A planning estimate built from the numbers you enter.Retaining Wall BlocksCount retaining wall blocks from the wall length and height and your block face size. Get an exact block count, plus guidance on when a wall needs an engineer.Retaining Wall CostEstimate retaining wall cost from wall length, height and your price per square foot of face, with a contingency buffer and engineer and permit reminders.Polymeric SandFind how many bags of polymeric sand you need to fill paver joints, from your patio area and the coverage printed on the bag. Formula and example included.Paver Base (Gravel & Sand)Calculate paver base gravel and bedding sand in cubic yards from your patio area and base depth. A clear formula, worked example and reference table.
Every Hardscaping tool is calculated server-side — visible immediately — with its formula, a worked example and a reference table, and works on the quantities you measure and the prices you enter. Background reading is in the guides.