Resistor Color Code

Decode 4, 5, or 6-band resistors to their resistance value and tolerance.

Number of Bands

Band 1 (Digit)

Band 2 (Digit)

Band 3 (Multiplier)

Band 4 (Tolerance)

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Resistance Value

—

Tolerance

±—%

Min Value

—

Max Value

—

Visual Reference

Documentation

How It Works

Resistors use colored bands to indicate their resistance value, tolerance, and temperature coefficient. Each color represents a digit (0–9), a multiplier, or a tolerance percentage.

Select the number of bands on your resistor, pick the color for each band, and the calculator will decode the value instantly.

Formula

4-band:

R = (D₁×10 + D₂) × Multiplier ± Tol%

5-band:

R = (D₁×100 + D₂×10 + D₃) × Multiplier ± Tol%

Last Updated: February 28, 2026

Disclaimer: For reference purposes only. Always verify critical resistance values with a multimeter.

Frequently Asked Questions