Deck & Patio Calculators
Deck boards, pavers and the base layers underneath them. 11 free calculators.
A deck or paver patio is really several materials at once - boards or pavers on top, base gravel and bedding sand underneath, polymeric sand or fasteners to finish it - and most calculators only ever size one of them.
These tools size the full material list for a deck or paver project together, so you leave with one shopping list instead of four separate numbers from four separate calculators.
Last reviewed September 2026
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All 11 Deck & Patio calculators
Paver Calculator and Price Estimator
Use this paver calculator to get pavers, gravel base, bedding sand and polymeric sand for a patio as one shopping list from one set of dimensions.
Paver Base Calculator
Use this paver base calculator for the tons and cubic yards of compacted base under a patio or walkway, with adjustable depth, density and waste.
Deck Board Material Calculator
Use this deck board material calculator to find the stock boards to buy, with the row count and total linear feet, including waste, behind the number.
Deck Joist Span Calculator
Deck joist span calculator from IRC Table R507.6. Check whether 2x6 to 2x12 Southern Pine joists span your deck at 12, 16, or 24 in. on center.
Deck Beam Span Calculator
Deck beam span calculator from AWC DCA 6 Table 3A. Check if a 2-ply or 3-ply 2x beam in Southern Pine spans between posts for your joist span.
Deck Footing Size Calculator
Deck footing size calculator from AWC DCA 6 Table 4. Get the round or square footing size, thickness, and max post height for Southern Pine posts.
Deck Railing Calculator
Deck railing calculator for balusters, posts, and guard height. Counts balusters so the gap stays under the 4 in. code limit, with the 36 in. height rule.
Baluster Calculator
Use this baluster calculator to count balusters for a railing section and see the even spacing and actual gap that keep every opening under your maximum.
Deck Stain Calculator
Use this deck stain calculator to estimate gallons of stain or sealer from surface area, coat count and coverage rate, with an optional cost line.
Polymeric Sand Calculator
Use this polymeric sand calculator to find how many 50 lb bags fill your paver joints, from patio area, paver size, joint width and joint depth.
Pergola Calculator
Use this pergola calculator to count posts, beam feet, rafters and rafter length for a free-standing pergola from its footprint and spacing choices.