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The Equivalent Resistance Calculator will calculate the:

- Equivalent resistance of a series combination of resistors
- Equivalent resistance of a parallel combination of resistors

**Calculator Limitations:** The Equivalent Resistance Calculator will calculate a maximum of 15 resistors.

The equivalent resistance of a series combination of resistors is Ω [Ohm] |

The equivalent resistance of a series combination of resistors is Ω [Ohm] |

(Equivalent resistance of a series combination of resistors calculation |
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R_{s} = R_{1} + R_{2} + R_{3}R _{s} = R _{s} = R _{s} = |

Equivalent resistance of a series combination of resistors |

R_{p} = 1/ + 1/R_{1} + 1/R_{2}1/R_{3}R _{p} = 1/R _{p} = R _{p} = R _{p} = |

Equivalent Resistance Calculator Input Values |

Please note that the formula for each calculation along with detailed calculations are available below. As you enter the specific factors of each equivalent resistance calculation, the Equivalent Resistance Calculator will automatically calculate the results and update the Physics formula elements with each element of the equivalent resistance calculation. You can then email or print this equivalent resistance calculation as required for later use.

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R_{s} = R_{1} + R_{2} + R_{3}

R_{p} = *1**/**1**/**R*_{1} + *1**/**R*_{2} + *1**/**R*_{3}

This formula derives from the formula:

The following Physics tutorials are provided within the Electrodynamics section of our Free Physics Tutorials. Each Electrodynamics tutorial includes detailed Electrodynamics formula and example of how to calculate and resolve specific Electrodynamics questions and problems. At the end of each Electrodynamics tutorial you will find Electrodynamics revision questions with a hidden answer that reveals when clicked. This allows you to learn about Electrodynamics and test your knowledge of Physics by answering the test questions on Electrodynamics.

- 15.1 - Electric Current. Current Density
- 15.2 - Electric Resistance. Combinations of Resistors
- 15.3 - Electric Potential Difference (Voltage). Ohm's Law
- 15.4 - Electric Circuits. Series and Parallel Circuits. Short Circuits
- 15.5 - Kirchhoff Laws
- 15.6 - Electric Power and Efficiency
- 15.7 - RC Circuits
- 15.8 - Miscellaneous

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