Resistor Color Code Calculator
Decode resistor color bands to find resistance value, tolerance range, and minimum/maximum resistance. Includes color code reference table.
Inputs
Results
Resistance
4.7 kΩ
How to Use This Calculator
- Select the color for each band: band 1 (first digit), band 2 (second digit), multiplier, and tolerance.
- For 5-band resistors, also select a third significant digit band.
- Review the decoded resistance value in ohms, tolerance (%), and min/max values.
- Use the reverse lookup to find the color code for a resistance value you want to order.
- The mnemonic 'Bad Boys Race Our Young Girls But Violet Generally Wins' helps remember the color order.
What each input means
- Band 1 (1st Digit)
- Color of the first resistor band.
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersBand 1 (1st Digit) = 4, Band 2 (2nd Digit) = 7, Band 3 (Multiplier) = 2, Tolerance Band = 2 = 4 input(s) provided
- Calculate ResistanceResistance = resistanceStr4.7 kΩ = 4.7 kΩ
- Calculate ToleranceTolerance5 = 5
- Calculate Min ResistanceMin Resistance4465 = 4465
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