Resistor Color Code Calculator

The Resistor Color Code Calculator supports two-way conversion between resistance values and color codes, and is compatible with both FIRSTOHM MELF and Leaded Resistors.

The FIRSTOHM Resistor Color Code Calculator helps users quickly convert between resistor color bands and resistance values. It is suitable for Leaded Resistors and MELF Surface Mount Resistors, providing a convenient reference for color code identification, resistance value conversion, and product selection.
The Resistor Color Code Calculator provides the following three functions:
1. Resistance Value → Color Code : Enter a resistance value to quickly obtain the corresponding resistor color code.
2.Color Code → Resistance Value : Enter the resistor color bands to quickly calculate the corresponding resistance value.
3.Resistance Value → Series : Enter an IEC standard resistance value to find the FIRSTOHM resistor part numbers that match the selected resistance value, helping users quickly identify suitable products. (Note: Product recommendations will not be displayed for resistance values that are not included in the IEC standard series.)

Notes
1. These functions are primarily designed for FIRSTOHM resistor products. Specifications may vary among different brands, so the results should be used for reference only.
2. An IEC Standard Resistance Value Table is available for download at the bottom of this page for convenient reference and product selection.