Ground Rod Resistance Calc

NEC 25-Ohm Compliance Tool

$4.99 · Designed for iPad. Not verified for macOS.

Also Included In

GroundRod Calc - professional calculator. Installing ground rods and need to verify NEC 25-ohm compliance before the inspector arrives? Enter rod length, diameter, soil resistivity, and number of rods. Get single rod resistance and total system resistance with correction factors for multi-rod arrays. Green pass or red fail indicator shows compliance at a glance. WHAT IT CALCULATES: - Single rod resistance using standard IEEE/NEC formula - Total system resistance for multi-rod arrays (up to 10 rods) - Correction factors for rod spacing and count - NEC 25-ohm pass/fail compliance indicator INPUTS: - Rod length (ft) - Rod diameter (in) - Soil resistivity (ohm-meters) - Number of rods - Rod spacing KEY FEATURES: - Color-coded NEC compliance indicator (green pass / red fail) - Multi-rod array support with correction factors - Instant results as you adjust inputs - Works completely offline - No account or login required Built for electricians, inspectors, and electrical contractors who need quick ground resistance verification on the job site.

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Version 1.0.3

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.

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    Accessibility

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    Information

    Seller
    Shanghai Sheyuan Network Technology Co., Ltd.
    Size
    924.7 KB
    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.

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