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Series resistors.

Add resistor values to find total series resistance.

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01 / QUESTION

Three 100 Ω resistors in series add up to:

Series resistances add: 100 + 100 + 100 = 300 Ω.

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How the calculation works

In series: R total = R1 + R2 + R3. The same current flows through all components.

KEY FORMULAIn series: R total = R1 + R2 + R3. The same current flows through all components.
02 /

Worked example

100 Ω + 220 Ω + 0 Ω equals 320 Ω.

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Before you rely on this result

Real resistors have tolerance. Check power dissipation and physical wiring too.

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Informational tool. It does not replace testing, measurement or professional advice when needed.

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Frequently asked questions

Does the order matter?+

No. The sum is independent of order for ideal series resistors.

Can R3 be zero?+

Yes. This version supports two or three resistors.