Practical tools for measured work
Baluster Spacing Calculator
Enter the railing opening, baluster width and maximum gap you intend to use to calculate an equal-spacing layout.
between posts
visual only
Confirm the correct limit for your project before using it here.
How it works
For a given opening and baluster width, the tool finds the smallest number of balusters whose resulting gap does not exceed your maximum, then distributes that gap evenly - including at both ends - so the layout is symmetric. In “exact count” mode, it instead divides the opening evenly for your chosen number of balusters.
Limitations
The result only checks the maximum gap you entered. It does not identify the legal limit for your jurisdiction, occupancy, stair or guard condition. Confirm the correct requirement before construction.
FAQ
Why isn't the gap exactly my maximum?
Does this apply to fence pickets too?
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