Construction

Spindle Spacing Calculator

Find spindle count and even gaps for a railing.

Rail length

Spindle width

Max gap

Calculated Output

Spindles needed 0

Actual gap 0

Formula: spindles = ⌈(rail − maxGap) ÷ (spindle + maxGap)⌉

Step-by-Step Breakdown

1. Values used:

2. Rail length = 1

3. Spindle width = 1

4. Max gap = 1

6. Spindles needed = 0

7. Actual gap = 0

Did this calculator solve your problem today?

The math behind it

Find the minimum spindles so gaps stay under the maximum, then evenly distribute the leftover space as equal gaps.

96 in rail, 1.5 in spindles, 4 in max gap → 18 spindles, ~3.7 in gaps.

Code gap?

Most codes require gaps a 4-inch sphere can't pass through.