Conductivity Calculator

Calculate electrical conductivity or resistivity using σ = 1/ρ. Compute conductivity from resistivity (σ = 1/ρ) or resistivity from conductivity (ρ = 1/σ). Features material database with 15 substances (Silver, Copper, Gold, Aluminum, Tungsten, Iron, Platinum, Lead, Nichrome, Carbon, Silicon, Glass, Rubber, Distilled Water, Seawater) with conductivity values at 20°C. Supports conductivity units (S/m, kS/m, MS/m, µS/cm, mS/cm) and resistivity units (Ω·m, Ω·cm, Ω·mm²/m, µΩ·cm). Includes material matching and conductivity category classification. Ideal for electrical engineering, material science, and physics applications.