18 Free Deck Calculators
Everything you need to plan, price, and build your deck — from total cost down to baluster spacing. Trusted by thousands of homeowners and contractors.
- 18 specialized tools
- Updated 2026 pricing
- 100% free, no signup
Choose your calculator
Organized by what you're trying to figure out. All tools are free and instant.
Cost & Estimation
Total project cost, material totals, and labor estimates.
Deck Cost Calculator
Estimate total deck cost by size, material, and features.
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Cost Per Square Foot Calculator
Compare installed cost per square foot across materials.
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Deck Labor Cost Calculator
Estimate labor cost separately from materials.
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Deck Permit Cost Calculator
Estimate building permit fees for your deck project.
Open calculator →Framing & Structure
Joists, beams, posts, footings, and load-bearing structure.
Deck Joist Calculator
Calculate the number of joists required by spacing.
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Deck Beam Span Calculator
Determine maximum beam span by lumber size and joist length.
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Deck Footing & Concrete Calculator
Calculate concrete needed for deck footings.
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Deck Post Calculator
Determine post count, size, and load.
Open calculator →Decking Boards
Board count, linear footage, and material waste.
Stairs & Railings
Stair stringers, treads, balusters, and railing materials.
Finishing & Maintenance
Stain, sealer, fasteners, and ongoing maintenance.
Advanced Tools
Comparison tools and specialty calculations.
Need a quick total cost estimate?
Start with our flagship deck cost calculator — get a full installed-cost range in under 60 seconds.
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