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Free Online Resistor Color Code Calculator

Decode a four-band resistor into resistance and tolerance using standard color digits and multipliers.

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Result



How to use Resistor Color Code Calculator
Decode a four-band resistor into resistance and tolerance using standard color digits and multipliers.
  1. Set First.
  2. Set Second.
  3. Set Multiplier.
  4. Set Tolerance.
  5. Run the tool, review the result and its stated limitations, then copy or download if needed.
Example & practical use
Decode a four-band resistor into resistance and tolerance using standard color digits and multipliers. The example below demonstrates First; Second; Multiplier; Tolerance.
Example input:
{
  "first": "brown",
  "second": "black",
  "multiplier": "red",
  "tolerance": "gold"
}
Expected result (relevant fields):
{
  "ohms": 1000,
  "tolerancePercent": 5
}
Features & result limitations
Decode a four-band resistor into resistance and tolerance using standard color digits and multipliers.
Frequently asked questions
What inputs does Resistor Color Code Calculator accept?
First; Second; Multiplier; Tolerance
How should I interpret the Resistor Color Code Calculator result?
Decode a four-band resistor into resistance and tolerance using standard color digits and multipliers.
Where does Resistor Color Code Calculator process my data?
Inputs are processed locally in your browser. Submitted text is not sent to external services. A successful-run event increments an aggregate tool counter without your input.