Deck Railing Calculator
Estimate deck railing materials
ft
ft
in
Formula
Balusters = Rail Length × (12 / (gap + width))
Code requires max 4" gap between balusters.
Examples
20ft railing, 3.5" gaps
~48 balusters, 5 posts.
Frequently Asked Questions
About Deck Railing
Estimate deck railing materials.