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Calculate electrical DC resistance of any conductor from material resistivity (ρ), cross-sectional area, length, and operating temperature.
Wire Material Check
Measure wire resistance, length and cross-section area to estimate resistivity.
Conductor Comparison
Lower resistivity means the material conducts electricity better for the same geometry.
This colorful original SVG shows conductor length, cross-sectional area and resistance path used in resistivity calculation.
This Resistivity Calculator estimates electrical resistivity using resistance, length and cross-sectional area.
Electrical resistivity describes how strongly a material opposes current flow. It is different from resistance because resistance depends on the physical size of the conductor, while resistivity is a material property. A long thin wire has more resistance than a short thick wire, even if both are made from the same material. By using length and cross-sectional area, this calculator converts a measured resistance into resistivity.
Resistivity is a material property that tells how strongly the material resists electric current.
The formula is ρ = R × A / L, where R is resistance, A is area and L is length.
Resistivity is commonly measured in ohm-meter, written as Ω·m.
No. Resistance depends on size and shape, while resistivity describes the material itself.
A larger cross-sectional area gives current more path to flow, reducing resistance for the same material.
Yes, if you know resistance, length and cross-sectional area of the copper conductor.
Yes. Many materials change resistivity with temperature.
Electrical Wire Resistance Calculator (Resistivity & Temperature) is a free online calculator tool. Use it to get instant, accurate results for your electronics calculations.