Color Code Calculator

Decode resistor color bands to determine resistance values and tolerance

Resistor Color Bands

Select the colors of each band on your resistor

Resistor Value

Calculated resistance and specifications

Select resistor colors to calculate the resistance value

Common Resistor Values

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220Ω (Red-Red-Brown)

4-band resistor

1kΩ (Brown-Black-Red)

4-band resistor

10kΩ (Brown-Black-Orange)

4-band resistor

4.7kΩ (Yellow-Violet-Red)

4-band resistor

Resistor Color Code Guide

4-Band Resistors

Most common type with ±5% or ±10% tolerance:

• 1st Band: First digit
• 2nd Band: Second digit
• 3rd Band: Multiplier (number of zeros)
• 4th Band: Tolerance (±%)

5-Band Resistors

Precision resistors with ±1% or ±2% tolerance:

• 1st Band: First digit
• 2nd Band: Second digit
• 3rd Band: Third digit
• 4th Band: Multiplier (number of zeros)
• 5th Band: Tolerance (±%)

Reading Direction: Always read resistor colors from left to right, starting from the end with bands closer together. The tolerance band is usually separated by a small gap.

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Color Code Calculator

220Ω (Red-Red-Brown)

1kΩ (Brown-Black-Red)

10kΩ (Brown-Black-Orange)

4.7kΩ (Yellow-Violet-Red)

4-Band Resistors

5-Band Resistors

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Color Code Calculator

220Ω (Red-Red-Brown)

1kΩ (Brown-Black-Red)

10kΩ (Brown-Black-Orange)

4.7kΩ (Yellow-Violet-Red)

4-Band Resistors

5-Band Resistors