About The Earthing Grid Resistance Estimator

The Earthing Grid Resistance Estimator gives a simplified grounding resistance estimate from soil resistivity, grid area, buried conductor length, and rod details.

How to Use the Earthing Grid Resistance Estimator Online

1. Enter soil resistivity and the grid footprint area.
2. Enter total buried grid conductor length plus rod count, length, and diameter.
3. Run the estimator to review grid, rod-group, and combined resistance components.

Choosing Options Correctly

Measured soil resistivity is the most important input. Layered soil, seasonal moisture, buried depth, rod spacing, conductor geometry, and touch/step voltage limits are not fully modeled here.

Common Use Cases

• Screen grounding designs before detailed modeling.
• Compare the effect of added rods or longer grid conductors.
• Estimate whether a field measurement is in the expected range.

Quick FAQ

Can this replace a grounding study?
No. Soil layering, seasonal moisture, fault current, touch voltage, step voltage, and grid geometry need a proper grounding analysis.

Does the page send grounding data anywhere?
The calculator runs in the page; do not include sensitive site details unless required for your own workflow.

What input affects the estimate most?
Soil resistivity usually dominates the result, and real sites often need measured resistivity at multiple spacings.

When should I involve a specialist?
For substations, generators, lightning protection, hazardous areas, or personnel safety checks, use a qualified grounding study.