Resistor Calculator

Find equivalent resistance for a list of resistors connected in series or in parallel.

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Input

Enter the resistor values and choose whether the network is in series or parallel. This tool shows the result instantly without step-by-step output.

Input summary

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How to use Resistor Calculator

Provide the resistor values and the connection type, and the calculator will reduce the list to one equivalent resistance value.

This calculator is for circuit design, lab work, and electronics homework when several resistors need to be simplified into one effective resistance.

Use series mode only when the current path flows through every resistor one after another without branching.
Parallel networks can produce a total resistance lower than the smallest resistor in the list, so that outcome is often correct.