Free deck calculators
Plan and price your deck in seconds. Brand-neutral estimates for cost, boards, footings, concrete, and stairs — no sign-up, no sales pitch.
Deck Cost Calculator
Estimate the total cost to build a deck by size, material, height, railing, and stairs.
Deck Board Calculator
Find out how many deck boards, screws, and fasteners your project needs.
Deck Footing & Concrete Calculator
Calculate the number of footings and bags of concrete for your deck posts.
Deck Stairs Calculator
Work out risers, rise height, treads, total run, and stringer length to code.
Deck Stain Calculator
Find how many gallons of stain or sealer your deck and railings need.
Deck Railing & Baluster Calculator
Calculate how many balusters you need and the exact code-safe gap spacing.
Why DeckCalc?
Most “deck cost calculators” come from a decking brand or a contractor chasing a lead, so they nudge you toward one product. DeckCalc is independent: we use published 2026 cost data and standard building math so you can compare materials and plan your build honestly.
Start with the cost calculator
Not sure where to begin? The Deck Cost Calculator gives you a full price range by size and material, then the board, footing, and stairs tools help you turn that plan into a shopping list.
Deck building guides
Want the background before you build? Our deck guides cover deck costs, composite vs. wood decking, footing depth and frost lines, and building deck stairs — in plain English.