Ground Rod Resistance Calc

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.