ClarityHow to use this tool
- Enter resistivity, conductor length, cross-sectional area.
- Select Calculate to view the result.
- Check the method and assumptions below before using the result.
Input reference and sample values
Use the units and choices shown for each field. Sample values are provided for practice, not as recommendations.
| Input | Format and units | Sample |
|---|---|---|
| Resistivity | Numeric value. Unit: Ω·m. Must be greater than zero. | 1.68e-8 |
| Conductor length | Numeric value. Unit: m. Must be greater than zero. | 10 |
| Cross-sectional area | Numeric value. Unit: mm². Must be greater than zero. | 2.5 |
Result for these sample inputs
0.0672 Ω
Select Try the example in the form to load these values and calculate them again. This replaces the current form inputs. Compare the result with the method and worked explanation below.
The method, explained
Resistance = resistivity × length/(area in mm² × 10⁻⁶).
Using resistivity = 1.68e-8 Ω·m, conductor length = 10 m, cross-sectional area = 2.5 mm², the result is 0.0672 Ω. Change these example inputs to match your task; use the method above to check each step.
What to keep in mind
Enter total conductor length. Temperature dependence and connections are excluded. Ideal-component calculation for study and estimation. It does not select safe wiring, protective devices or component ratings for an installation.
Methodology maintained by ClarityKit. How these tools are built and checked.