Resistor Color Code Calculator
Calculate 4-band resistor values in Ohms or decode resistance numbers back into color bands instantly.
Configure 4-Band Colors
Reverse Lookup (Ohms to Bands)
How to Read 4-Band Resistors
Standard 4-band resistors use color codes to indicate electrical resistance values and manufacturing tolerance percentages.
- Band 1 & 2: Represent the first and second significant digits of the resistance value.
- Band 3 (Multiplier): Represents the factor by which the significant digits are multiplied (e.g., Red = ×100, Orange = ×1,000).
- Band 4 (Tolerance): Represents the precision percentage or maximum deviation from the stated value (Gold = ±5%, Silver = ±10%).
Frequently Asked Questions
Got questions about the Resistor Color Code Calculator? Find quick answers below.
Is the Resistor Color Code Calculator tool free to use?
Yes, our Resistor Color Code Calculator tool is 100% free with to use on UtilityGlen with no hidden fees, subscriptions, or usage limits required.
Does the Resistor Color Code Calculator tool upload my data?
No, your data never leaves your browser. All text conversion and decoding are executed locally on your device for total privacy.
Can I use the Resistor Color Code Calculator tool on mobile?
Yes, our Resistor Color Code Calculator tool is fully responsive and optimized to work seamlessly on smartphones, tablets, and desktop browsers alike.