Rail Calculator

The lengths of each side of a deck often vary. As a result, the post spacings for a railing will vary as will the length of the railing section that fits between each post.

This tool will save you time and show you how far apart to set your balusters from each other and from each post so the balusters appear perfectly balanced in each of your railing sections.

Common Measurements

Width of Baluster:

Spacing Between Balusters:

Spacing Between Posts

Section A:

Section B:

Section C:

**Based on your selected baluster width (b), spacing (c) and distance between opposing post faces (a), the space between the posts and the first and last baluster has been calculated a displayed below (d).