Resistor Calculator
Calculates the total resistance of three resistors connected in series.
How it works
Calculates the total resistance of three resistors connected in series.
Formula and assumptions
Series resistance = R1 + R2 + R3. For parallel connections, use the reciprocal-sum formula instead; this tool is specifically for series wiring.
Example
Use the sample values, calculate, and change one input at a time.
Frequently asked questions
Are results exact? Results depend on the assumptions and inputs above.
Can I use this for professional decisions? Verify critical results independently.
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Frequently asked questions
Does this calculate parallel resistors?
No. It sums three resistors in series; parallel circuits use a different formula.
What should I check before relying on the result?
Confirm the input units and assumptions described above; independently verify safety-critical, medical, financial or professional decisions.