Smart Decking Calculator

All Deck Calculators

27 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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Deck material takeoff list beside stacked lumber on a job site

Deck Material Calculator

Complete materials takeoff: boards, joists, beams, posts, footings, hardware.

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Tape measure across new deck boards used to price cost per square foot

Deck Cost Per Square Foot Calculator

2026 deck cost per square foot by material, DIY vs contractor.

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Two-level elevated backyard deck with stairs between levels

Multi Level Deck Cost Calculator

Cost for two- and three-level decks, second-story and elevated builds.

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Old weathered deck boards being pried up for replacement

Deck Replacement Cost Calculator

Cost to replace deck boards, railings, or rebuild the whole deck.

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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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Composite deck boards being laid across joists with even spacing gaps

Deck Board Calculator

How many deck boards you need, by board width, gap, and length.

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Tape measure along a deck board showing linear feet of decking

Square Feet to Linear Feet Calculator

Convert deck square footage to linear feet of decking, and back.

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Capped composite Trex-style deck boards next to natural wood decking

Trex Decking Calculator

Boards and cost for Trex, TimberTech, AZEK, Fiberon, and Deckorators.

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Wooden deck wrapping around an above ground swimming pool

Pool Deck Calculator

Decking area, boards, and cost for a deck around an above-ground pool.

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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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Wooden deck stairs with cut stringers, treads and a landing

Deck Stair Calculator

Number of steps, rise per step, total run, and stringers needed.

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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

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Smart Fencing Calculator

Android app — fence cost estimates on the go.

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