Spindle Spacing Calculator
Result
Spindle Spacing Calculator Calculate the number of spindles/balusters and exact gap between them to comply with IRC 4-inch rule. — free online calculator.
Formula
- Spindle Spacing Calculator calculates its result from Span, Maxgap, Spindle Width, Width. It uses the formula n = ⌈(span + maxGap) / (spindle width + maxGap)⌉; actual gap = (span − n × width) / (n + 1). Change any input to recalculate the result instantly.
- The main inputs are Span, Maxgap, Spindle Width, Width. Enter them in the units and format shown in the calculator.
- Keep measurements and project assumptions consistent before comparing or combining values.
- Changing any input above recalculates the result with the same calculation engine used by this page.
Example: Spindle Spacing
- Span: 2
- Maxgap: 3
- Spindle Width: 4
- Width: 5
Using Span = 2, Maxgap = 3, Spindle Width = 4, Width = 5, the calculated result is -1.5.
Sample result: Calculating…
Frequently asked questions
What does the Spindle Spacing calculate?
Spindle Spacing Calculator Calculate the number of spindles/balusters and exact gap between them to comply with IRC 4-inch rule. — free online calculator.
Which values should I enter?
Enter Span, Maxgap, Spindle Width, Width using the units and format shown beside each field.
What formula does this calculator use?
The calculator uses the following relationship: n = ⌈(span + maxGap) / (spindle width + maxGap)⌉; actual gap = (span − n × width) / (n + 1).
Why might my result differ from another source?
Results can differ when another source uses different units, rounding rules, conventions or assumptions. Compare the inputs and definitions before comparing results.
Does the result update automatically?
Yes. Changing an input updates the result using the same calculation engine shown on this page.