How to estimate deck boards
Estimate rows from the deck width divided by board width plus gap. Multiply rows by boards needed to span the length, then add waste.
Before you buy
This is a simplified straight-layout estimate. Joists, framing, staggered joints, stairs, railings, and fasteners are excluded.
Does it include framing?
No. It estimates deck surface boards only.
Last reviewed: October 2026. This tool performs calculations locally in your browser.