Resistor Color Code Calculator
Pick the band colors of a 4-band or 5-band resistor to read its resistance and tolerance.
1 kΩ
± 5%
Reads as 1,000 Ω
Select each color band to decode a resistor's value. Supports 4-band and 5-band resistors.
How to use
- Choose 4-band or 5-band mode.
- Select the color of each band from left to right.
- Read the resistance value and tolerance.
Frequently asked questions
- What is the difference between 4-band and 5-band?
- 5-band resistors add a third significant digit for higher precision.
- What does tolerance mean?
- It is the percentage the actual resistance may vary from the marked value.