Deck Calculator

Estimate boards, joists, and fasteners for a rectangular deck.

Calculator Construction Updated Apr 19, 2026

Length (ft) Width (ft)

Board width (in) Joist spacing (in) Waste %

Notes

Boards

Board width + 1/8" gap

Joists

16" on center standard

Fasteners

~7 screws per linear foot

Last updated: April 19, 2026