Series & Parallel Resistor Calculator
Calculate the total resistance of resistors connected in series or in parallel.
Enter your values and press Calculate.
How to use the Series & Parallel Resistor calculator
Calculate the total resistance of resistors connected in series or in parallel. Enter your values above and press Calculate; the result appears instantly, and the formula used is shown below so you can check the working.
Formula
Series: R = R₁ + R₂ + …. Parallel: 1/R = 1/R₁ + 1/R₂ + …
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