Baluster Calculator
Calculate the perfect baluster spacing and count for your deck or staircase railing. Determine exactly how many balusters you need for any railing length.
Step 1: Railing Measurements
Building Code Requirements
Most building codes require baluster spacing to be less than 4 inches to prevent small children from passing through. Always check local building codes for specific requirements.
Step 2: Calculation Options
Spacing Tips
For even spacing, calculate exact spacing first, then adjust if needed. Slight variations in spacing are often unnoticeable but must meet building code requirements.
Baluster Calculation Results
Total Balusters Needed
Baluster Layout Visualization
Baluster Post Gap
Spacing Formula
Baluster Spacing Formula
Number of balusters = (Railing length – Total post width) ÷ (Baluster width + Desired spacing)
Actual spacing = (Railing length – Total post width – Total baluster width) ÷ (Number of balusters + 1)
Spacing Options Comparison
| Spacing (inches) | Balusters Needed | Total Cost* | Code Compliant |
|---|
*Based on estimated $5 per baluster
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