# Baluster Spacing Calculator

> Baluster spacing calculator: compute on-center spacing and exact gaps so balusters pass the 4-inch sphere code test. Editable widths, free, in your browser.

- **Canonical URL:** https://boringtoolskit.com/baluster-spacing-calculator/
- **Category:** Construction & Measurement
- **Evidence level:** catalogue
- **Reviewed:** July 26, 2026
- **Last verified:** 2026-10-12
- **Privacy:** Inputs and results stay in this browser unless the page clearly labels an external request.

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