57 Free Deck Calculators — Cost, Framing & Materials
Estimate what your deck will cost in 2026, then size every part of it — boards, joists, beams, footings, stairs, and railings. Every calculator is free, needs no signup, and shows the arithmetic behind its answer.
- 57 specialized tools
- Updated 2026 pricing
- 100% free, no signup
Deck build essentials
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DEWALT 20V MAX Cordless Drill and Impact Driver, Power Tool Combo Kit , Includes 2 Batteries, Charger and Bag (DCK240C2)
Save 25%
$179.00List Price:: $239.00
CAMO EDGEClip Universal Hidden Deck Fasteners Clip (450 ct)
$199.99
Check price on Amazon
FrogTape Pro Grade Deck and Joist Flashing Tape, 1.89 in x 50 Feet, Black
Save 17%
$18.75Typical price:: $22.55
Deck Plus Deck Screws, #10 x 2-1/2in, 365 Pieces,5 Lb Box, Tan
Save 9%
$29.98List Price:: $32.99
Prices and savings as of Sep 30, 2026, 4:35 AM UTC. Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.
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 →Deck Material Calculator
Complete materials takeoff: boards, joists, beams, posts, footings, hardware.
Open calculator →Deck Cost Per Square Foot Calculator
2026 deck cost per square foot by material, DIY vs contractor.
Open calculator →Multi Level Deck Cost Calculator
Cost for two- and three-level decks, second-story and elevated builds.
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Deck Replacement Cost Calculator
Cost to replace deck boards, railings, or rebuild the whole deck.
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Porch Cost Calculator
What a front, back or wrap-around porch costs to build.
Open calculator →Screened Porch Cost Calculator
What screening in a porch costs, including the screen system itself.
Open calculator →Deck Removal Cost Calculator
What it costs to tear out and dispose of an old deck.
Open calculator →Floating Deck Cost Calculator
What a ground-level floating deck costs — the cheapest deck you can build.
Open calculator →Covered Deck & Deck Roof Cost Calculator
What it costs to put a roof over an existing deck — and what the deck needs first.
Open calculator →Pergola Cost Calculator
Pergola cost by size, material and mounting — kit, DIY or built in place.
Open calculator →Balcony Cost Calculator
What a balcony costs to build or replace, including the parts a deck never needs.
Open calculator →Deck Resurfacing Cost Calculator
Cost to re-deck an existing frame — new boards and railing, same structure.
Open calculator →Wood Deck Cost Calculator
What a pressure-treated, cedar, redwood or ipe deck costs to build — and to keep up for 25 years.
Open calculator →Composite Deck Cost Calculator
What a composite or PVC deck costs installed, by board tier, size, height and fastening.
Open calculator →DIY Deck Cost Calculator
What building your own deck costs in materials, tools and permits — and what it saves against a contractor.
Open calculator →Deck Repair Cost Calculator
Price the repairs item by item — boards, joists, posts, railing, stairs — and see whether replacing makes more sense.
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 →Joist Spacing Calculator
The spacing your decking actually requires, and how many joists that means.
Open calculator →Deck Joist Span Calculator
How far a joist can span before you need another beam.
Open calculator →Hot Tub Deck Load Calculator
Whether your deck can carry a filled hot tub, and exactly what to add if it cannot.
Open calculator →Deck Ledger Board Calculator
Fastener spacing, count and layout for the ledger, straight from the DCA 6 table.
Open calculator →Deck Framing Calculator
A complete framing takeoff: joists, rim, beam, posts, footings, blocking and hangers.
Open calculator →Deck Weight Capacity Calculator
How much weight your deck is designed to carry, and how many people that really is.
Open calculator →Concrete Calculator for Deck Footings
Cubic yards and bag count for deck footings, in any diameter and depth.
Open calculator →Deck Cantilever Calculator
How far joists or a beam may overhang their support — the one-quarter rule, checked against the joist span table.
Open calculator →Deck Post Spacing Calculator
How far apart deck posts can be for your beam and joists, how many you need, and the load on each footing.
Open calculator →Deck Block Calculator
How many concrete deck blocks a floating deck needs, the load on each, and the gravel pads under them.
Open calculator →Decking Boards
Board count, linear footage, and material waste.
Deck Board Calculator
Calculate boards needed by deck size and board width.
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Deck Board Footage Calculator
Convert deck area to linear board footage.
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Deck Screw & Fastener Calculator
Estimate screws or hidden clips for your deck.
Open calculator →Deck Board Calculator
How many deck boards you need, by board width, gap, and length.
Open calculator →Square Feet to Linear Feet Calculator
Convert deck square footage to linear feet of decking, and back.
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Trex Decking Calculator
Boards and cost for Trex, TimberTech, AZEK, Fiberon, and Deckorators.
Open calculator →Pool Deck Calculator
Decking area, boards, and cost for a deck around an above-ground pool.
Open calculator →Deck Board Gap & Spacing Calculator
The gap to leave between deck boards, and the exact board count it produces.
Open calculator →Stairs & Railings
Stair stringers, treads, balusters, and railing materials.
Stair Stringer Calculator
Stringer length, the board size you need, and the cut layout.
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Deck Railing Cost Calculator
Estimate cost of railing by linear footage and material.
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Deck Baluster Calculator
Count balusters needed for code-compliant railing.
Open calculator →Deck Stair Calculator
Number of steps, rise per step, total run, and stringers needed.
Open calculator →Deck Stairs Cost Calculator
What a set of deck stairs costs by height, width, material and railing.
Open calculator →Cable Railing Calculator
Cable runs, total cable, fittings and posts for a code-compliant cable railing.
Open calculator →Finishing & Maintenance
Stain, sealer, fasteners, and ongoing maintenance.
Deck Stain Coverage Calculator
Calculate gallons of stain needed.
Open calculator →Deck Cleaning & Sealing Cost
Estimate cost to clean and re-seal your deck.
Open calculator →Deck Skirting Cost Calculator
Material and cost to close in the space under a deck.
Open calculator →Deck Lighting Cost Calculator
How many deck lights you need, where they go, and what the whole system costs.
Open calculator →Deck Sealing & Staining Cost Calculator
What it costs to clean, seal or stain a deck, and how often it comes round again.
Open calculator →Deck Refinishing Cost Calculator
What it costs to strip, sand and restain a deck — contractor or DIY.
Open calculator →Deck Paint Calculator
Gallons of deck paint, solid stain or resurfacer for the deck, railing and stairs, with primer and cost.
Open calculator →Advanced Tools
Comparison tools and specialty calculations.
Deck charts & code guides
Span tables, code requirements, and estimating walkthroughs — the reference material behind every calculator.
Deck Joist Span Chart
Max spans for 2×6 through 2×12 at 12, 16, and 24 inch spacing.
Read the guideDeck Beam Span Chart
Built-up beam spans and post spacing by joist span.
Read the guideRailing Height & Code
36 vs 42 inch guards, 4-inch spacing, and load requirements.
Read the guideDeck Permit Requirements
When you need a permit, what it costs, and every inspection.
Read the guideHow to Estimate a Deck
The nine-step takeoff professionals use to price a build.
Read the guideDeck Ledger Board
Fastener spacing from the DCA 6 table, flashing order, and walls that cannot take one.
Read the guideHot Tub on a Deck
Filled weight, the load per square foot, and the framing that carries it.
Read the guideDeck Stair Code
Rise, run, the 3/8 inch uniformity rule, throat depth and handrails.
Read the guideHow to Build a Deck
The full sequence, with the two inspections that cannot be done after the fact.
Read the guideDeck vs Patio vs Porch
What each costs, how long they last, and which suits your ground.
Read the guideWhich Calculator to Use
Every tool on this site, matched to the question you're asking.
Read the guideCost and materials by deck size
Pick your footprint for an installed cost in six materials and a full material list — boards, joists, footings, concrete and screws.
Deck cost where you live
Labour, footing depth and permits change the price by state. Local prices per square foot, a calculator priced for your area, and permit rules for all 50 states.
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.
Smart Drywall Calculator
Android app — drywall sheets, mud, and tape estimates.
Smart Fencing Calculator
Android app — fence cost estimates on the go.
Need a quick total cost estimate?
Start with our flagship deck cost calculator — get a full installed-cost range in under 60 seconds.
Calculate My Deck Cost