# Wire Resistivity Calculator | Wire Resistivity Formula

This page covers Wire **Resistivity Calculator** and **Resistivity Formula**. This resistivity calculator takes wire resistance,
wire length and wire cross sectional area as inputs and calculates resistivity as output.

**Introduction**:

Resistance of electric conductor depends on following factors.

• Length of conductor

• Cross sectional area of the conductor

• Type of conductor material

• Temperature of the material

➤Resistance (R) = ρ* l / a , Ohms

Where, ρ = Resistivity of the material (in Ohm-meters)

l = length of wire, (in meters)

a = cross section area of wire (in meter^{2})

• Resistivity varies with temperature.

• Good conductors of electricity possess low values of
resistivity.

• Good insulators have high value of resistivity.

• Following are the resistivity values of some of the
popular materials.

➤Copper : 1.7 x 10^{-8} Ωm

➤Aluminium : 2.6 x 10^{-8} Ωm

➤Carbon : 10 x 10^{-8} Ωm

➤Glass : 1 x 10^{8} Ωm

➤Mica : 1 x 10^{-13} Ωm

## Wire Resistivity calculator

Following Wire Resistivity calculator calculates resistivity of the wire with formula provided below.

Example of Wire Resistivity calculator:

INPUTS : Wire resistance = 0.25 Ω , Wire length = 40 meters, Area = 3.2 mm^{2}

OUTPUTS: Resistivity = 2 x 10^{-8} Ω*m

## Resistivity Formula or Equation

Following Resistivity formula is used for calculation in this calculator.

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