Resistor Color Code Calculator
Colors ↔ resistance for common through-hole resistors.
Bands
Mode
1st digit
2nd digit
Multiplier
Tolerance
Resistance
1 kΩ ±5%
What is this tool?
Through-hole resistors encode value and tolerance with colored bands. Four-band parts use two significant digits, a multiplier, and tolerance; five-band parts add a third significant digit. This tool works both directions with visual color swatches.
How to use it
- Choose 4-band or 5-band mode.
- Either select band colors to read resistance, or enter ohms to get suggested bands.
- Confirm tolerance and measure with a meter when precision matters.
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