Analyze resistivity, conductivity, and resistance using advanced inputs. Compare materials, units, and electrical properties instantly. Generate exports, visualize trends, and interpret results with confidence.
Use any supported mode. Geometry, unit conversion, temperature adjustment, and optional electrical diagnostics are included.
| Material | Resistivity (Ω·m) | Conductivity (S/m) | Length (m) | Area (mm²) | Approx. Resistance (Ω) |
|---|---|---|---|---|---|
| Copper wire | 1.72e-8 | 5.81e7 | 2.00 | 1.20 | 0.0287 |
| Aluminum rod | 2.82e-8 | 3.55e7 | 3.50 | 6.50 | 0.0152 |
| Carbon composite strip | 3.50e-5 | 2.86e4 | 0.75 | 9.00 | 2.9167 |
Resistivity from conductivity: ρ = 1 / σ
Conductivity from resistivity: σ = 1 / ρ
Resistance from geometry: R = ρL / A
Resistivity from resistance: ρ = RA / L
Conductivity from resistance: σ = L / (RA)
Temperature correction: ρ(T) = ρ₀ [1 + α(T − T₀)]
Current density: J = I / A
Electric field: E = V / L
Experimental conductivity: σ = J / E
Resistivity measures how strongly a material opposes electric current. Conductivity measures how easily current flows. They are reciprocals, so increasing one decreases the other.
Longer paths create more opposition to charge flow, while larger cross-sectional areas provide more room for carriers. That is why resistance rises with length and falls with area.
Enable it when your material property is known at one temperature but your device operates at another. Metals commonly show noticeable resistivity changes as temperature changes.
Ω·m is the SI standard and is best for consistent engineering calculations. Ω·cm and micro-ohm-meter formats are useful when matching datasheets or laboratory references.
Yes. First convert conductivity to resistivity using ρ = 1/σ, then apply R = ρL/A. This calculator handles both steps automatically when geometry is provided.
An invalid value usually means the chosen temperature coefficient and temperature change produce a non-physical negative resistivity. Recheck α, the reference temperature, and the target temperature.
Current density describes current per unit area. Electric field describes voltage per unit length. Together they help estimate experimental conductivity through the relation σ = J/E.
Yes. It works for wires, rods, strips, and any sample where a clear length and cross-sectional area can be defined or derived from the chosen geometry.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.