Decking Calculator
Decking Calculator
Estimate the deck boards, joists, and fasteners you need for your deck — instantly and for free. Enter your deck size, then shop the materials below.
DECKING CALCULATOR
Deck size in, material list out — boards, joists, and fasteners.
Your Deck
ft
ft
You’ll Need
—
Deck Boards
—
Sq Ft
Decking — total length— ft
Joists (16" OC)—
Joist material — total length— ft
Deck screws—
Board count includes your pattern waste and is rounded up to whole boards.
Shop Decking & Fasteners →Estimate only — Tier A (geometry). Counts the surface material for the deck size you enter. It does not size joists, beams, posts, or footings for load — that’s a structural question. For span and footing sizing, talk to us or your engineer. Always round up and keep spares on the job.
Shop the job
Shop Decking Materials
Got your numbers? Grab everything for the build in one trip.
Shop links open our online store — coming online shortly.