JUJUMI工程计算器 · Engineering Calculators

Resistance Formula

Compute conductor resistance R and conductance G=1/R from resistivity ρ, length L and area A (wire/PCB design).

Inputs

Formula

R = ρ L / A; G = 1/R
R = ρ L / Aρ 电阻率, L 长度, A 截面积
Resistance Formula schematic

How to use

  1. Fill in Resistivity ρ, Length L, Area A in the Inputs section (watch the unit on each field).
  2. Click Calculate; the tool evaluates the formula shown above.
  3. Read Resistance R, Conductance G in the results area.
Formula notesResistance R = ρ·L/A (ρ resistivity, L length, A area); temp R = R₀(1+α·ΔT).