Cable Resistance Calculator
Calculate electrical cable/wire resistance with our comprehensive calculator. Estimate resistance based on material, length, cross-sectional area, and temperature.
Step 1: Cable Specifications
Understanding Cable Resistance
Resistance depends on material resistivity, length, and cross-sectional area. Longer, thinner wires have higher resistance. Copper has low resistivity (1.68×10⁻⁸ Ω·m), making it ideal for electrical wiring.
Step 2: Environmental Factors
About Temperature Effects
Resistance increases with temperature for most metals due to increased atomic vibrations. The temperature coefficient (α) quantifies this change: R₂ = R₁[1 + α(T₂ – T₁)].
Resistance Calculation Results
Calculated Resistance
Material Resistance Comparison
| Material | Resistivity (Ω·m) | Resistance | Relative to Copper |
|---|
Resistance Breakdown
Resistance Formula
R = ρ × (L / A)
Where: R = Resistance (Ω), ρ = Resistivity (Ω·m), L = Length (m), A = Cross-sectional area (m²). For temperature effects: R₂ = R₁[1 + α(T₂ – T₁)], where α = temperature coefficient.
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