Electronics Tools

Resistor Color Code Converter

Decode 4, 5, and 6 band resistors instantly or find colors for any resistance.

This bidirectional tool translates between color bands and resistance values. You can select colors to calculate the resistance, or type a value (e.g., 4.7k) to instantly see the required color code.

It supports 4, 5, and 6-band systems and includes an E-Series Checker to verify if your calculated resistance is a standard industry part (E24/E96).

Configuration

Ω

Live Visual

Analysis
Resistance Value
— Ω
± –%
Checking…
Range: —

How to Use

Two ways to use: Select Colors or Type Value.

1

Option A: Read a Resistor

Hold your resistor with the tolerance band (Gold/Silver) on the right. Select the matching colors in the dropdowns to decode the value.

2

Option B: Find Colors

Type a value like “10k” or “4.7M” in the “Quick Find” box. The tool will automatically set the correct color bands for you.

3

Verify Standard Series

Check the badge below the result. Standard E24 means it’s a common part. Custom Value means it might be hard to buy.

Common Questions regarding Resistor Color Codes

What do the bands mean?
In a 4-band resistor:
  • Band 1 & 2: Significant digits (e.g., Red, Red = 22)
  • Band 3: Multiplier (e.g., Orange = x1,000)
  • Band 4: Tolerance (e.g., Gold = ±5%)
How do I tell which end is which?
Look for the gap. There is usually a larger gap between the Multiplier band and the Tolerance band. Also, Gold and Silver bands are almost always Tolerance bands and appear on the far right.
Why use a 5-band or 6-band resistor?
5-Band resistors provide an extra significant digit for higher precision (1% tolerance or better). 6-Band resistors add a Temperature Coefficient (PPM) band, indicating how much the resistance changes with temperature.