Series Resistance Calculator
A free, browser-based calculator. Runs entirely in your browser — no sign up, nothing stored.
100% FreeRuns in your browserBasic
Enter Values
Enter your values and press Calculate to see results.
How to use this calculator
- Enter the resistor values.
- Press Calculate.
How it works
Resistors in series simply add up: R1 + R2 + R3.
Worked example
10 Ω + 20 Ω. = 30 Ω.
Related tools
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.