Plan Your Deck With Confidence
Free deck calculators to estimate boards, materials, costs, framing quantities, and more. Plan your next outdoor project with clear calculations and practical tools.
From first sketch to shopping list
Each calculator uses a documented method, editable assumptions, and purchase-friendly rounding. No signup and no arbitrary outputs.
Deck Material Calculator
Estimate decking boards, framing quantities, fasteners, and configurable material cost.
Open calculatorDeck Board Calculator
Count board rows, stock boards, linear footage, and estimated offcuts.
Open calculatorDeck Cost Calculator
Build an editable project budget from materials, labor, railings, stairs, and site work.
Open calculatorDeck Stair Calculator
Lay out risers, treads, total run, and preliminary stair materials.
Open calculatorDeck Square Footage Calculator
Measure rectangles, L-shapes, two-section plans, or custom polygons.
Open calculatorComposite Deck Calculator
Estimate composite boards, hidden or face fasteners, and an editable product cost.
Open calculatorChoose the right level of detail
Start broad, then move into board layout, framing quantities, finishes, and costs as your plan develops.
Deck Planning
Area, board layout, materials, composite products, and waste.
Structural Material Estimates
Joists, beams, posts, footings, and stairs—quantity-only where engineering is required.
Finishing & Accessories
Railings, fasteners, and product-specific stain coverage.
Costs & Budgets
Editable allowances for new builds and full replacement projects.
A useful estimate in three steps
Enter your measurements
Start with a preset or enter measured dimensions in imperial or metric units.
Customize the assumptions
Choose real board sizes, stock lengths, spacing, prices, and waste for your project.
Review and export
See the method, save locally, share a configuration, or download a project PDF.
Know what the number means
Good estimating software exposes its assumptions. These tools keep calculated quantities, user inputs, and structural limitations clearly separated.
Measure once. Estimate clearly.
Complete Deck Materials List: What You Need to Build a Deck
Build a scope-aware materials list from decking and framing through connectors, concrete, railing, stairs, and finish.
Read guide Field guideHow Many Deck Boards Do I Need?
Use actual board width, gaps, stock lengths, and layout direction.
Read guide Field guideCost to Build a Deck: A Scope-First Estimating Guide
Build an auditable budget from local quotes, project scope, labor, access, and contingency.
Read guide