Free Online Tool
Resistor Color Code Calculator
Select the first digit, second digit, multiplier, and tolerance colors to read a 4-band resistor.
The result will appear here.
How to Use
- Choose the first and second band colors.
- Choose multiplier and tolerance colors.
- Review resistance value and tolerance.
Examples
- Brown-black-red-gold is 1kΩ ±5%
- Yellow-violet-orange-gold is 47kΩ ±5%
Calculation and Conversion Notes
This calculator uses the 4-band resistor standard. Resistance is calculated as `(first digit × 10 + second digit) × multiplier`. Tolerance is displayed from the fourth band color.
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