Series Resistance Calculator
Sum resistors wired in series: R_total = sum(R_i).
Description
Add positive resistor values to obtain ideal equivalent series resistance.
Series Resistance Calculator add positive resistor values to obtain ideal equivalent series resistance.
Use this when components carry the same current in one series path or when combining resistor values before another circuit calculation.
When to use Series Resistance Calculator
Use this when components carry the same current in one series path or when combining resistor values before another circuit calculation.
How it works
Equivalent resistance is the arithmetic sum of every supplied resistance in ohms.1
Interpreting the result
Keep the input units, direction conventions, encoding, and ordering rules visible when reusing the result. Preserve the full returned value for downstream calculations and round only for presentation.
Assumptions and limitations
This assumes an ideal series topology. Wiring resistance, tolerance, temperature, parasitics, and parallel current paths are not included.
References
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Resistors in Series and Parallel — OpenStax