Baluster Gap & Spacing Calc

Deck Railing Spindle Count

$7.99 · Designed for iPad. Not verified for macOS.

Also Included In

11ft 7in deck span, 1.5-inch balusters - even gaps under the 4-inch sphere? Exact count, gap, on-center spacing, IRC R312.1 / IBC pass-fail. $4.99 one-time, no login. Guessing at baluster spacing wastes material and risks failing inspection. The 4-inch sphere rule sounds simple, but getting even gaps across an odd-length span requires math. This app does it instantly. Enter total span between posts, baluster width, post width, and max allowed gap (IRC 4-inch residential or IBC 6-inch commercial preset). Get the exact number of balusters, actual gap size, on-center spacing, and instant code pass/fail check. Supports deck railings, stair railings, fence sections, and porch guards. IRC R312.1 and IBC compliant gap limits built in. Shows full layout summary with post-to-baluster spacing. KEY FEATURES: - IRC and IBC gap presets - Even spacing calculation - Code compliance check - Works completely offline - No account or login required Built for deck builders, carpenters, general contractors, and home inspectors.

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Added a More Pro Tools section to discover related field calculators.

Version 1.0.2

The developer, Shanghai Sheyuan Network Technology Co., Ltd., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    Shanghai Sheyuan Network Technology Co., Ltd.
    Size
    1.1 MB
    Category
    Utilities
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • iPad
      Requires iPadOS 17.0 or later.
    • Mac
      Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    English
    Age Rating
    4+
    Copyright
    © 2026 Sheyuan Inc.
  • Developer Website
  • Privacy Policy

    • Supports

    • Family Sharing

      Up to six family members can use this app with Family Sharing enabled.

    More by Shanghai Sheyuan Network Technology Co., Ltd.

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