Parallel Resistors Calculator

Equivalent Parallel Resistance

This calculator finds the total equivalent resistance for two or three resistors connected in parallel.

Method: It adds the reciprocal of each resistor value, then takes the reciprocal of that sum.

Understanding Parallel Resistors

1. What This Calculator Measures

Parallel resistors provide multiple current paths, so the equivalent resistance is lower than the smallest branch resistance.

2. How the Calculation Works

The calculator adds reciprocal resistance values and then takes the reciprocal of that total.

3. Formula or Rule Used

1 / Rt = 1 / R1 + 1 / R2 + 1 / R3.

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