Resistivity Calculator Resistivity Calculator Resistivity Calculator Resistance Ω kΩ MΩ Length m cm mm Cross-sectional Area m² cm² mm² Calculate Understanding Resistivity Resistivity (ρ) is a fundamental property of a material that quantifies how strongly it opposes the flow of electric current. It is independent of the material's size and shape. Formula: ρ = (R × A) / L Where: ρ (rho) is the resistivity in ohm-meters (Ω·m) R is the resistance in ohms (Ω) A is the cross-sectional area in square meters (m²) L is the length in meters (m) Example: Calculate the resistivity of a wire with: Resistance (R) = 10 Ω Length (L) = 2 m Cross-sectional Area (A) = 0.5 mm² = 0.0000005 m² Resistivity (ρ) = (10 Ω × 0.0000005 m²) / 2 m = 2.5 × 10⁻⁶ Ω·m Typical Resistivity Values: Silver: 1.59 × 10⁻⁸ Ω·m Copper: 1.68 × 10⁻⁸ Ω·m Aluminum: 2.82 × 10⁻⁸ Ω·m Iron: 9.71 × 10⁻⁸ Ω·m Silicon: 640 Ω·m Applications: Designing electrical components and circuits Selecting materials for specific electrical applications Quality control in manufacturing processes Characterizing new materials in research and development Use the calculator above to experiment with different values and see how they affect the resistivity of a material! Subscribe to Updates Get the latest creative news from SmartMag about art & design. By signing up, you agree to the our terms and our Privacy Policy agreement.