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Plan your deck materials with confidence
Five focused deck-planning calculators for US homeowners and DIY builders. Estimate boards, joists, fasteners, railing, and footing concrete with clear formulas and sensible waste factors.
Deck calculators
Pick a tool to get an instant, transparent estimate.
Deck Board CalculatorBoards, rows, and linear feet from deck size, board width, gap, and waste.Open Deck Joist CalculatorJoist count and linear length from spacing and span (quantity only).Open Deck Fastener CalculatorScrews or hidden clips from board rows and joist count, with boxes.Open Deck Railing CalculatorPosts, balusters, and rail length across multiple straight runs.Open Footing Concrete CalculatorConcrete volume and bag count for circular or square footings.Open
Built for real deck planning
Transparent math
Every result shows the formula, a worked example, and the assumptions behind it.
Save & share
Save one deck project locally and reuse it across calculators, or share exact inputs by link.
Honest limits
These are quantity estimates only. We always point you back to local code and manufacturers.
Deck planning guides
How to Estimate Deck MaterialsA practical, order-of-operations walkthrough that ties all five calculators together with one worked example.Deck Board Spacing GuideHow gap size and actual board width change your row count, drainage, and final board quantity.Deck Waste Factor GuideChoosing a sensible waste percentage for straight, diagonal, and complex deck layouts.Deck Planning ChecklistAn ordered checklist from first measurement to a complete, waste-adjusted material list.