Series Resistor Calculator

Enter several resistor values to calculate their series equivalent resistance locally in your browser.

Resistors (Ω)

Optional test voltage (V)

One value per line, comma, or space.

—Total equivalent resistance

—Components

—Current at test V

—Total power at test V

—Largest resistor

Educational / low-voltage electronics calculator. Real components have tolerances and non-ideal behavior. Do not use this page as a substitute for qualified design or safety guidance for mains/high-energy electrical systems.

How to use this Series Resistor Calculator

Add resistor values in series and inspect total resistance and current for an optional test voltage. Enter your values above and the result is calculated directly in your browser. No account is required.

Fast answer, clear inputs

This tool is built around one job: give the answer quickly without forcing a signup or hiding the result. Related tools are linked nearby when the next calculation or conversion is useful.