Series Resistor Calculator
Add series resistors and find their equivalent resistance.
Equivalent resistance
Complete every resistor to calculate.
Formula and method
Req = R1 + R2 + …
Important assumptions
In series, the same current flows through every resistor and voltage drops add.
Frequently asked questions
Does the calculation run locally?
Yes. Values are processed in your browser and are not sent to a server.
Can I use it for a real installation?
Use it as an educational reference and verify components, tolerances, safety, and applicable code with technical documentation or a qualified person.
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