Smart Decking Calculator

All Deck Calculators

18 free, accurate deck calculators — from total cost down to baluster spacing. Every tool is updated with current 2026 pricing.

Cost & Estimation

Total project cost, material totals, and labor estimates.

Calculator and notepad resting on a sunlit cedar deck — deck cost estimation

Deck Cost Calculator

Estimate total deck cost by size, material, and features.

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Tape measure stretched across cedar deck boards measuring square footage

Cost Per Square Foot Calculator

Compare installed cost per square foot across materials.

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Two carpenters with tool belts installing deck boards on a backyard deck

Deck Labor Cost Calculator

Estimate labor cost separately from materials.

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Building permit document and deck blueprint with pen on a wooden table

Deck Permit Cost Calculator

Estimate building permit fees for your deck project.

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Framing & Structure

Joists, beams, posts, footings, and load-bearing structure.

Underside view of parallel pressure-treated deck floor joists

Deck Joist Calculator

Calculate the number of joists required by spacing.

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Structural wood deck beam with metal joist hangers seen from below

Deck Beam Span Calculator

Determine maximum beam span by lumber size and joist length.

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Concrete footing being poured around a metal post anchor for a deck

Deck Footing & Concrete Calculator

Calculate concrete needed for deck footings.

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Vertical 6x6 wood deck support posts standing on concrete footings

Deck Post Calculator

Determine post count, size, and load.

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Decking Boards

Board count, linear footage, and material waste.

Stack of fresh composite deck boards on a job site

Deck Board Calculator

Calculate boards needed by deck size and board width.

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Long deck boards measured with a yellow tape showing linear footage

Deck Board Footage Calculator

Convert deck area to linear board footage.

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Stainless steel deck screws and hidden fastener clips on a wood board

Deck Fastener Calculator

Estimate screws or hidden clips for your deck.

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Stairs & Railings

Stair stringers, treads, balusters, and railing materials.

Newly built outdoor wooden deck stairs with cut stringers visible

Stair Stringer Calculator

Calculate stair stringer length, rise, and run.

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Modern black aluminum cable deck railing on a cedar deck at sunset

Deck Railing Cost Calculator

Estimate cost of railing by linear footage and material.

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Evenly spaced white wooden balusters on a deck railing

Deck Baluster Calculator

Count balusters needed for code-compliant railing.

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Finishing & Maintenance

Stain, sealer, fasteners, and ongoing maintenance.

Paintbrush applying amber wood stain to a deck board

Deck Stain Coverage Calculator

Calculate gallons of stain needed.

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Pressure washer cleaning a weathered wood deck, before and after

Deck Cleaning & Sealing Cost

Estimate cost to clean and re-seal your deck.

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Advanced Tools

Comparison tools and specialty calculations.

Side-by-side comparison of natural cedar and gray composite deck boards

Composite vs Wood Cost Comparison

Compare 25-year total cost of composite vs pressure-treated wood.

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Beautiful suburban home with a brand new large wooden deck

Deck ROI Calculator

Estimate resale value added by your deck.

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Most popular gear for deck projects

As an Amazon Associate we earn from qualifying purchases. Affiliate disclosure.

Outdoor Solid Composite Decking Boards 96"x5.43"x1", Polymer Composite Decking for All Weather Use,Poolside,Backyard,Patio(6 Pcs,Redwood and Maple,21.72sqft)

Outdoor Solid Composite Decking Boards 96"x5.43"x1", Polymer Composite Decking for All Weather Use,Poolside,Backyard,Patio(6 Pcs,Redwood and Maple,21.72sqft)

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Swanson Tool Co PL001M Magnetic Composite Post Level, Yellow, Includes Elastic Loop for Hands-Free Work and 3 Vials for Easy Plumb and Level Reads

Swanson Tool Co PL001M Magnetic Composite Post Level, Yellow, Includes Elastic Loop for Hands-Free Work and 3 Vials for Easy Plumb and Level Reads

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SUNVIE All-in-One Low Voltage Deck Lights Kit, 8 Pack 5W Low Voltage Landscape Lighting with 60W Transformer 100FT Wire and Connectors, 3000K 12-24V AC/DC LED Deck Step Lights for Fence Post Patio

SUNVIE All-in-One Low Voltage Deck Lights Kit, 8 Pack 5W Low Voltage Landscape Lighting with 60W Transformer 100FT Wire and Connectors, 3000K 12-24V AC/DC LED Deck Step Lights for Fence Post Patio

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Ready Seal Exterior Wood Stain | Semi-Transparent Oil-Based Formula | Professional Grade Stain and Sealer in One | Ideal for Decks, Fences, Pergolas, Wood Siding & More | 5 Gallon | Natural Cedar

Ready Seal Exterior Wood Stain | Semi-Transparent Oil-Based Formula | Professional Grade Stain and Sealer in One | Ideal for Decks, Fences, Pergolas, Wood Siding & More | 5 Gallon | Natural Cedar

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Building something else? Try our sister calculators

Smart Fencing Calculator

Estimate fence cost by material and linear footage.

Smart Roofing Calculator

Free roof replacement cost estimates by material.