Spindle Spacing Calculator
Estimate spindle count and spacing for railings and fences
Enter the total length of your railing or fence, the width of each spindle, and your desired gap between spindles (all in millimeters). The calculator will estimate the number of spindles that fit and the actual spacing for an even layout.
The calculator uses the following formulas:
- Number of Spindles = floor((Length + Spacing) ÷ (Spindle Width + Spacing))
- Actual Spacing = (Length - (Spindle Count × Spindle Width)) ÷ (Spindle Count - 1)
This ensures all spindles and gaps fit within the total length.
- Spindle width: Wider spindles reduce the number that fit.
- Desired spacing: Larger gaps allow fewer spindles.
- Total length: Longer railings accommodate more spindles.
- Building codes: Check local regulations for maximum allowed spacing.
- Deck and stair railings
- Porch and balcony balustrades
- Fence picket layouts
- Custom woodworking projects
- Mark spindle positions before installation for accuracy.
- Use spacers or jigs to maintain even gaps.
- Double-check measurements to avoid errors.
- Comply with safety and code requirements.
How do I calculate the number of spindles needed?
The calculator uses the total length, spindle width, and desired spacing to estimate the number of spindles that fit, rounding down to ensure spacing is not exceeded.
What is the actual spacing between spindles?
The actual spacing may differ slightly from your target. The calculator provides the precise gap based on your inputs and the number of spindles.
Should I use the calculated spacing or my desired spacing?
Use the calculated spacing for even distribution. Adjust as needed to meet building codes or design preferences.