Type
Please enter all required numeric values.
RESULTS
Input Parameters Specification
MaterialSelect copper, aluminium, silver, gold, tungsten, platinum, lead, or graphite for resistivity-based wire resistance.
GaugeEnter AWG number such as 10, 12, 18, or large wire notation such as 4/0, 3/0, 2/0.
ResistivityMaterial resistivity in ohm-meter is filled automatically from the selected conductor material.
OutputsDiameter, area, kcmil, resistance per 1000 feet, and resistance per kilometer are calculated.
Practical Operational Examples
Copper Wire Resistance
Estimate copper conductor resistance for transformer winding, electrical wiring, power cable, and AWG wire selection.
Material Comparison
Compare aluminium, silver, gold, tungsten, platinum, lead, and graphite wire resistance for different conductor designs.
Diagrams & Theory
Wire resistance depends on material resistivity, conductor length, and cross-sectional area. A larger AWG conductor has more area and lower resistance, while high-resistivity materials increase resistance.
Formulas & Mathematical Logic
Step 1: Select material. The calculator sets resistivity ρ in ohm-meter from the original material table.
Step 2: Convert AWG input. 6/0 becomes -5, 5/0 becomes -4, 4/0 becomes -3, 3/0 becomes -2, 2/0 becomes -1, and normal AWG is used directly.
Step 3: Diameter in inches = 0.005 × 92^((36 - n) / 39).
Step 4: Diameter in mm = 0.127 × 92^((36 - n) / 39).
Step 5: Area = (π / 4) × diameter². kcmil = 1000 × diameter(in)².
Step 6: Resistance per 1000 feet and resistance per kilometer are calculated from resistivity and conductor area using the original JavaScript logic.
Step-by-Step Example
Example: Select Copper and enter 10 AWG.
The calculator fills copper resistivity from the material table.
It converts 10 AWG into diameter using the AWG exponential diameter equation.
Area is calculated from the diameter, then resistance is calculated for Ω/kft and Ω/km.
The result helps compare conductor size, material resistance, and wire loss for real wiring work.
How to Use This Calculator
Select the conductor material from the dropdown.
Enter AWG size such as 12, 10, 8, or large notation like 4/0.
Check that resistivity is filled automatically.
Click Calculate.
Read diameter, area, kcmil, Ω/kft, and Ω/km outputs.
About This Calculator
Calculate wire resistance from AWG size and conductor material.
The CalcBoy Resistance of a Standard Wire Gauge Wire Calculator helps estimate diameter, area, kcmil, and resistance for different wire materials.
Wire resistance is not only about gauge size. The conductor material also matters. Copper and silver have low resistivity, aluminium is lighter but more resistive, and materials like tungsten or graphite can have much higher resistance. This calculator combines AWG geometry with material resistivity so you can compare how the same gauge behaves with different conductor materials.
This is useful for electrical wiring checks, transformer winding estimates, heating wire experiments, lab conductor comparisons, cable loss estimation, coil design, and quick workshop calculations. AWG tells the physical wire diameter, but resistance depends on both diameter and material. Larger wire has more cross-sectional area, so it usually has lower resistance per length. Smaller wire or high-resistivity material increases voltage drop and power loss.
Best UseAWG wire resistance, conductor comparison, coil winding and cable loss estimates.
Material EffectCopper, silver, aluminium, gold and other materials produce different resistance values.
Gauge EffectLower AWG numbers are thicker and usually have lower resistance.
Design ReminderTemperature, insulation, stranding and installation conditions can change real cable performance.
Tip: For power wiring, use this result as an electrical estimate only. Final conductor selection should also consider ampacity, insulation temperature, installation method, voltage drop limits, and local electrical code.
Frequently Asked Questions
What does this AWG wire resistance calculator show?
It shows AWG wire diameter, cross-sectional area, kcmil, resistance per 1000 feet, and resistance per kilometer for the selected material.
Why does material affect wire resistance?
Each material has a different resistivity. Lower resistivity materials like copper and silver carry current with less resistance than high-resistivity materials.
Can I enter 4/0 or 2/0 AWG?
Yes. The calculator supports large AWG notation such as 6/0, 5/0, 4/0, 3/0, and 2/0.
What is kcmil?
kcmil is thousand circular mils, a common conductor size unit for larger electrical cables.
Is copper always better than aluminium?
Copper has lower resistance, but aluminium is lighter and often cheaper. Final choice depends on current, distance, weight, cost, terminals and electrical code.
Does temperature change wire resistance?
Yes. Most metals have higher resistance at higher temperature, so real wire resistance can increase during operation.
Can this be used for final electrical installation?
Use it for planning and comparison. Final installation should be checked against local code, ampacity tables, voltage drop limits and safety rules.
Related Calculators
SWG to MM ConverterConvert Standard Wire Gauge into diameter and cross-sectional area.
Copper and Aluminium Wire Cable Size CalculatorEstimate cable size from voltage, current, distance and voltage drop.
Resistivity CalculatorCalculate material resistivity from resistance, area and length.
Ohm’s Law CalculatorCalculate voltage, current, resistance and power.