# Test and Measurement World

## Test and Measurement World Measurements Section

One Stop For Your Test and Measurement Need

## 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 meter2)

• 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 108 Ωm
➤Mica : 1 x 10-13 Ωm

### Wire Resistivity calculator

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

Resistance, Ω (input1) :

Length, meters (input2) :

Cross section area, mm2 (input3) :

Resistivity, ρ (Output):

Example of Wire Resistivity calculator:
INPUTS : Wire resistance = 0.25 Ω , Wire length = 40 meters, Area = 3.2 mm2
OUTPUTS: Resistivity = 2 x 10-8 Ω*m

### Resistivity Formula or Equation

Following Resistivity formula is used for calculation in this calculator.

### Useful converters and calculators

Following are the links to other useful measurements available on Test and Measurement World website.
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Current measurement vs Voltage measurement
Inductance measurement vs Capacitance measurement
Difference between Power and Energy measurements
EMC measurement vs EMI measurement
Electric and Magnetic Field Measurements

### What is difference between or comparison between

Following links mention difference or comparison between various equipments:
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Oscilloscope Bandwidth versus Rise time
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Difference between Oscillscope types
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