Series ResistanceThis calculator requires the use of Javascript enabled and capable browsers. Begin by entering the resistance values into the resistance input box. Please be sure to click on the "Enter Resistance" button after each entry followed by clicking on the resistance entry box to prepare for the next resistor value entry. There is no reasonable limitation as to the number of entries as long as you follow each entry by clicking on the "Enter Resistance" button and again on the entry box to allow for the next entry. After the last resistance value has been entered, click on the "Calculate Resistance" button for the returned series resistance value and the number of resistor values entered. Series resistance is the sum total resistance value of the resistors in series. It uses the formula RT = R1 + R2 + R3. In the formula given, RT is the total (series) resistance of the circuit, R1 is the resistance value of the first resistor, R2 is the resistance value of the second resistor, R3 is the resistance value of the third resistor, and on until the last resistor. Input value is assumed to be ohms and returns in the same input value. See the information below the calculator for explanation of the formula. To calculate parallel resistance, use our Parallel Resistance Calculator.

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