basic

Three Parallel Resistors Calculator

1 / R_eq = 1/R₁ + 1/R₂ + 1/R₃.

Compute the equivalent resistance of three resistors connected in parallel: 1 / R_eq = 1/R₁ + 1/R₂ + 1/R₃. Reports R_eq and the conductance G_eq.

Dr. Helena Ortiz By Dr. Helena Ortiz
Published Last reviewed 1 min read

Inputs

Ω
Ω
Ω

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

R_eq = 1 / (1/R₁ + 1/R₂ + 1/R₃)

In depth

Compute the equivalent resistance of three resistors connected in parallel: 1 / R_eq = 1/R₁ + 1/R₂ + 1/R₃. Reports R_eq and the conductance G_eq.