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Parallel Resistance Two Resistors

Calculate equivalent resistance (ω) using the parallel resistance two resistors formula.

Equivalent resistance (Ω): -
Visual representation

Parallel Resistance Two Resistors diagram

The diagram updates with your entries and is illustrative, not necessarily drawn to scale.

Calculation explained

How this result was calculated

The formula, your substituted values, and the evaluated result are shown below.

Reference: Formulae and Tables, State Examinations Commission (2014), page 62.
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How the Parallel Resistance Two Resistors works

This calculator applies the formula given in Formulae and Tables, State Examinations Commission (2014), page 62. Enter values in consistent units.

Formula and inputs

1 ÷ (1 ÷ r1+1 ÷ r2)

Inputs: Resistance R₁ (Ω), Resistance R₂ (Ω).

Using the result

The result is rounded to 4 decimal places. Check units, assumptions and significant figures before using the answer.

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