Grounding & Earthing Calculators: Free Resistance & Rod Tools

Design safe and code-compliant grounding systems with our free online grounding and earthing calculators. Whether you are installing a residential earthing electrode, calculating touch potential for a substation, or verifying soil resistivity for a commercial facility, these tools compute grounding resistance, electrode spacing, and step voltage limits instantly. Enter soil resistivity measurements, electrode dimensions, and burial depth to determine if your design meets NEC Article 250 or IEC 60364 requirements. Each calculator includes formulas for single rods, multiple rods, ground plates, and mesh grids with correction factors for soil composition and moisture content. Electricians, engineers, and safety inspectors use these tools to prevent dangerous ground potential rise and ensure protective devices operate during faults. No signup required—access from any device and validate your earthing design before installation.