Resistor Color Code
Calculate resistance from 4-band and 5-band color codes
Resistors use colored bands to indicate their resistance value and tolerance. Use this tool to quickly decode them.
Calculator Inputs
If 4-Band: This is Multiplier. If 5-Band: This is 3rd Digit.
If 4-Band: Select Tolerance. If 5-Band: Select Multiplier.
Results
Enter values above to see your results
How It Works
4-Band: Digit, Digit, Multiplier, Tolerance. 5-Band: Digit, Digit, Digit, Multiplier, Tolerance.
Tips & Best Practices
- •Gold or Silver is usually the last band (Tolerance).
- •Read from the end closer to the edge.
Frequently Asked Questions
Why 5 bands?
5-band resistors are higher precision (1% or less tolerance) and need an extra significant digit.
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