Series Resistance Calculator
List your resistors to get their total series resistance.
Runs in your browser — nothing is uploaded—
Details
For learning, hobby and prototyping use. Not professional electrical design advice — follow applicable codes and standards.
How to use Series Resistance Calculator
- Enter your values — the unit for each field is shown next to it.
- The result updates instantly as you type.
- Copy the results, or change inputs to compare scenarios.
Formula & assumptions
Series: R = R₁ + R₂ + …
Parallel: 1/R = 1/R₁ + 1/R₂ + …