Free to use, no account
Baluster Spacing Calculator
Enter the clear distance between the inside faces of two posts and the baluster width. Calculate an even gap for a chosen count or the minimum count that stays under your chosen gap.
How do I space balusters evenly?
Subtract the combined width of the balusters from the clear opening, then divide the remainder by the number of spaces. This calculator includes an equal space at both ends, so the number of gaps is one more than the number of balusters.
Frequently asked questions
How do I space balusters evenly?
Subtract the combined width of the balusters from the clear opening, then divide the remainder by the number of spaces. This calculator includes an equal space at both ends, so the number of gaps is one more than the number of balusters.
Are my measurements uploaded?
No. The spacing calculation runs locally in this browser; measurements are not sent to a server or saved by this tool.
How many gaps are there for a row of balusters?
With a clear space at both ends, a row of N balusters has N + 1 equal gaps. The calculator uses that convention and states it in the result.
Does this calculator check building-code safety?
No. It only distributes a chosen count or maximum gap evenly. Applicable codes may define measurement methods and limits; confirm them with local authorities and a qualified professional.