Resistor Color Code Calculator
Interactive tool to decode resistor values from color bands or calculate colors from values
5.1 kΩ
Tolerance: ±5%
Enter a value above
Tolerance: ±5%
Frequently Asked Questions
How do I read resistor color codes?
Resistor color codes can be read by identifying each colored band's value. The first 2-3 bands represent significant digits, the next band is the multiplier, and the last band indicates tolerance.
What's the difference between 4-band and 5-band resistors?
4-band resistors have 2 significant digits, while 5-band resistors have 3 significant digits for higher precision. Our calculator supports both types.
How accurate is this resistor calculator?
Our tool provides 100% accurate calculations based on standard resistor color code conventions used worldwide in electronics.