The Balustrade Spacing calculator helps you achieve perfectly spaced balusters that comply with building regulations, which typically require gaps no larger than 125mm in Australia.

By entering your section width (rail length), baluster width, and max gap size, the calculator determines the optimal number of balusters and precise spacing measurements to ensure even, compliant gaps.

Key Features

• Calculate compliant baluster spacing automatically
• Determine the exact number of balusters needed
• Ensure equal end margins for a professional finish
• Adjust for different baluster widths and shapes
• If given result isn't quite right select from a list of alternative layouts

How to Use

1. Enter the total length of your handrail or balustrade
2. Input the width of your balusters or pickets
3. Specify your desired maximum gap size (typically 125mm for compliance in Australia)
4. The calculator will determine the optimal number of balusters and spacing
5. Use the provided measurements for installation