Decks planning tool

Deck Material Calculator

Create a transparent rectangular field takeoff using dimensions and assembly choices you supply.

Transparent takeoff

Enter your deck materials

Planning takeoff only. Verify spacing, gaps, board dimensions, and fasteners with current manufacturer instructions and local requirements.

Plan responsibly

Before You Build

This project may be subject to local permit, zoning, site, or structural requirements.

Permit and inspectionConfirm locally required plans, permits, inspections, and approved details before construction.
Local adoption and amendmentsVerify the locally adopted code, amendments, loads, species/grade rules, and product instructions.
Design loadsObtain project-specific design loads and framing criteria from approved documents or a qualified designer.

Takeoff only: This calculator does not design a deck or select allowable spans, joist spacing, beams, posts, footings, guards, stairs, ledgers, or connections.

Use independently verified inputs: Enter joist spacing, board dimensions, gaps, and fastening assumptions already verified for the actual design and selected products.

View code references

Model-code reference

2012 OTHER, Section DCA 6

Prescriptive residential wood-deck framing guidance: DCA 6 illustrates framing, spans, spacing, connections, guards, and foundations; the calculator does not select or verify any of them.

Source: American Wood Council — DCA 6 Prescriptive Residential Wood Deck Construction Guide · Reviewed 2026-08-24

Local requirements may differ. A model-code reference does not confirm the code edition, amendments, zoning rules, or permit requirements adopted where the project is located.

Model-code references

2012 OTHER, Section DCA 6: Prescriptive residential wood-deck framing guidance. Source: American Wood Council — DCA 6 Prescriptive Residential Wood Deck Construction Guide. Reviewed 2026-08-24.

Local requirements may differ. Verify the adopted code, amendments, zoning rules, and permit requirements with the local authority.

Methodology

How we calculate this

Board rows are rounded up from actual board width plus entered gap. Joists are rounded up so actual layout spacing does not exceed the entered maximum. Basic face fasteners equal rows times joists times entered fasteners per intersection.

rows = ceil((width + gap) ÷ (board width + gap))

Planning takeoff only

This tool does not design the deck or verify spans, loads, connections, species, grade, footings, guards, or local code.

Verify the selected products

Confirm board gap, support spacing, fastener type and count, and end conditions with current manufacturer instructions and local requirements.

Know the exclusions

Stairs, picture framing, fascia, blocking, beams, posts, ledgers, hangers, footings, railings, openings, and cut optimization are excluded.

Worked examples