Deck Calculator

Calculate materials needed for building a deck.

Deck Length (ft)

Deck Width (ft)

Decking Board Size

Joist Spacing (inches)

Total Railing Length (ft)

Deck Building Guide

Building a deck requires careful planning for structural integrity. Posts should be set in concrete below the frost line (typically 36-48 inches deep). Joists are typically spaced 16 inches on center for standard decking. Always use pressure-treated lumber for structural components. Check local building codes for requirements on railings (usually required for decks 30+ inches above grade), post sizes, and beam spans. Budget approximately $15-35 per square foot for materials (wood deck) or $25-50 for composite.