Deck Calculators

Estimate deck board quantities and spacing for common rectangular deck layouts.

Deck Board Calculator

Estimate how many deck boards are needed across a deck based on width, board size, and gap.

Calculate board count and adjusted spacing for a deck width.

How to Calculate Deck Boards explains the basic board coverage and spacing calculation. How to Calculate Deck Board Linear Feet explains how to turn board rows into a linear-foot estimate.

Board counts can change with board lengths, butt joints, picture framing, diagonal layouts, cuts, defects, and installation details.