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Home › Math Tools › Parallel Resistor Calculator

Parallel Resistor Calculator

Calculate the total resistance of resistors connected in parallel.

math Math
Total (Ω)—

How to Use

  1. Enter up to three resistor values.
  2. Get the parallel total resistance.
  3. Or use the reciprocal formula 1/R = 1/R1 + 1/R2 + ...

Use Cases

Parallel resistance always less than the smallest resistor — compute it instantly.

Nothing is uploaded — all processing happens locally in your browser.

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