CHEMANDY ELECTRONICS Suppliers of the unusual

Round Wire Resistance Calculator

Calculates the dc Resistance of a single round wire of common conducting materials using the formula below.

 
Resistivity (ρ):  x 10-8 Ω.m
Enter the length of the conductor:   cm
Enter the diameter of the conductor:   mm d.c. Resistance:    Ω
 

Note: To use different values for the Resistivity, select Enter Data in the Conductor Material selection text box and then enter the required values in the box highlighted in amber.

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The dc resistance of a conductor is calculated using the formula:-

[Formula for Rdc]

Where ρ is the resistivity of the conductor in Ω.m

l is the Length in metres

A is the Cross-sectional area in metres

The values for ρ are from CRC Handbook of Chemistry and Physics 1st Student Edition 1998 page F-88 and are for high purity elements at 20°C.

Table of "bench mark" measurements made in our lab using Enamelled Copper Wire
 
Diameter (mm) Length (cm) Voltage (V) Current (A) Measured Resistance (Ω) Calculated Resistance (Ω)
1.0 41.0 0.0091 1.031 0.008826 0.0087596
0.5 41.0 0.0359 1.031 0.03482 0.0350385
0.2 41.0 0.24 1.032 0.2326 0.2189908

This calculator is provided free by Chemandy Electronics in order to promote the FLEXI-BOX

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