How to Read Resistor Color Codes (4/5/6 Bands)

• Resistor Color Code Tool

TL;DR

• 4 bands: 2 digits + multiplier + tolerance
• 5 bands: 3 digits + multiplier + tolerance
• 6 bands: same as 5 + tempco

Example (4-band)

Yellow–Violet–Red–Gold = 47 × 10² = 4.7 kΩ, ±5%

• Resistor Color Code Tool
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Frequently Asked Questions

Which direction do I read resistor color codes?

Start from the end where bands are grouped closer together. The tolerance band (often gold or silver) is usually separated with a larger gap. If bands are evenly spaced, the tolerance band is typically at the right end.

What's the difference between 4, 5, and 6 band resistors?

• 4-band: 2 significant digits, multiplier, tolerance. Most common type.
• 5-band: 3 significant digits (more precise), multiplier, tolerance. Used for tighter tolerances.
• 6-band: Same as 5-band plus temperature coefficient band for precision applications.

What does tolerance mean?

Tolerance indicates how much the actual resistance can vary from the stated value. Gold = ±5%, Silver = ±10%, Brown = ±1%, Red = ±2%. A 1000Ω resistor with ±5% tolerance can be anywhere from 950Ω to 1050Ω.

Can I use this calculator for SMD resistors?

No, SMD (Surface Mount Device) resistors use numeric codes, not color bands. This calculator is for through-hole resistors with color bands.

What standard does this follow?

This follows IEC 60062 international standard for resistor color coding, used worldwide. The color code system was developed because printed numbers would be too small to read on tiny components.

How do I find the color code for a specific resistance value?

Use our Resistor Color Code Calculator to enter a resistance value and find the nearest standard resistor with its color code. The tool shows both 4-band and 5-band options.