Dial in spindle counts, gap sizes, and visual layouts between newel posts. Automatically shift spacing to keep ends clean so no spindle lands in a post.
Enter your span and spacing to preview a layout.
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The Spindle Calculator is an essential tool for carpenters and joiners who need to calculate the correct number of spindles for balustrades and staircases. This calculator ensures even spacing between spindles while preventing them from landing inside newel posts, resulting in professional and code-compliant installations.
Our spindle calculator takes the guesswork out of balustrade design. Simply enter the distance between newel posts, your target gap between spindles, and the spindle width. The tool calculates the optimal number of spindles, the actual gap achieved, and the edge gaps at either end. A visual preview shows the layout with handrail and base rail.
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The spindle calculator is trusted by UK construction professionals for accurate balustrade planning. Whether you're working on residential staircases or commercial balustrades, this tool helps you achieve code-compliant spacing and professional finishes. The calculator ensures spindles never land inside newel posts, which is crucial for both safety and aesthetics.
For more information about building regulations and balustrade requirements, visit UK Building Regulations or consult CITB for construction standards.