When you need exact resistance values for analog signal conditioning, precision voltage dividers, or active filters, standard 5% carbon film resistors will not cut it. You need 1% (or better) metal film resistors, which use a 5 band color code to encode three significant digits, a multiplier, and a tolerance. The direct answer for reading them: read the three digits, multiply by the fourth band's factor, and verify the fifth band for the acceptable variance. Below is the complete reference data you need at the bench.
How to Read the 5 Band Color Code Chart
Before looking up values, you must correctly orient the component. Unlike 4-band resistors where the gold or silver tolerance band is an obvious visual anchor, 5-band precision resistors often use brown (1%) or red (2%) for tolerance—colors that also appear in the digit bands.
To determine the correct reading direction, look at the physical spacing. The tolerance band (Band 5) is typically spaced slightly further away from the first four bands. If the spacing is uniform, look for a gold or silver multiplier band (Band 4); if present, that must be on the right side, as gold and silver are never used for the first three significant digits. When in doubt, use a multimeter to verify your assumed orientation.
The columns in the chart below map directly to the physical bands on the resistor body:
- Bands 1, 2, and 3: The first, second, and third significant digits of the resistance value.
- Band 4 (Multiplier): The power of ten to multiply the significant digits by.
- Band 5 (Tolerance): The maximum allowable deviation from the nominal value at 25°C.
Complete 5 Band Resistor Color Code Table (IEC 60062)
The following table is sourced from the IEC 60062 international standard for marking codes for resistors and capacitors. This standard governs the color-to-value mapping used by all major manufacturers (Vishay, Yageo, KOA Speer).
| Color | Band 1 (1st Digit) |
Band 2 (2nd Digit) |
Band 3 (3rd Digit) |
Band 4 (Multiplier) |
Band 5 (Tolerance) |
|---|---|---|---|---|---|
| Black | 0 | 0 | 0 | ×1 Ω | — |
| Brown | 1 | 1 | 1 | ×10 Ω | ±1% (F) |
| Red | 2 | 2 | 2 | ×100 Ω | ±2% (G) |
| Orange | 3 | 3 | 3 | ×1 kΩ | ±3% (H)* |
| Yellow | 4 | 4 | 4 | ×10 kΩ | ±4% (J)* |
| Green | 5 | 5 | 5 | ×100 kΩ | ±0.5% (D) |
| Blue | 6 | 6 | 6 | ×1 MΩ | ±0.25% (C) |
| Violet | 7 | 7 | 7 | ×10 MΩ | ±0.1% (B) |
| Grey | 8 | 8 | 8 | ×100 MΩ | ±0.05% (A) |
| White | 9 | 9 | 9 | ×1 GΩ | — |
| Gold | — | — | — | ×0.1 Ω | ±5% (J)** |
| Silver | — | — | — | ×0.01 Ω | ±10% (K)** |
* Orange and Yellow tolerance bands are exceptionally rare in modern production. ** Gold/Silver tolerance is typically reserved for 4-band carbon film resistors, but may appear on older or specialized 5-band wirewounds.
Quick-Jump Reference: Most Queried Precision Values
Five-band resistors are almost exclusively manufactured to the E96 series standard values (unlike 4-band resistors which follow the E24 series). Here are the bookmark-friendly color codes for the most commonly searched E96 precision values used in op-amp feedback loops and ADC voltage dividers.
| Target Value | Band 1 | Band 2 | Band 3 | Band 4 | Band 5 (1%) | Math Verification |
|---|---|---|---|---|---|---|
| 10.0 Ω | Brown (1) | Black (0) | Black (0) | Gold (×0.1) | Brown | 100 × 0.1 = 10 |
| 100 Ω | Brown (1) | Black (0) | Black (0) | Black (×1) | Brown | 100 × 1 = 100 |
| 1.00 kΩ | Brown (1) | Black (0) | Black (0) | Brown (×10) | Brown | 100 × 10 = 1k |
| 4.99 kΩ | Yellow (4) | White (9) | White (9) | Brown (×10) | Brown | 499 × 10 = 4.99k |
| 10.0 kΩ | Brown (1) | Black (0) | Black (0) | Red (×100) | Brown | 100 × 100 = 10k |
| 22.1 kΩ | Red (2) | Red (2) | Brown (1) | Red (×100) | Brown | 221 × 100 = 22.1k |
| 100 kΩ | Brown (1) | Black (0) | Black (0) | Orange (×1k) | Brown | 100 × 1k = 100k |
What the Color Chart Cannot Tell You
While the IEC color code standard perfectly defines nominal resistance and initial tolerance, it is completely blind to several critical parameters that dictate real-world circuit behavior.
1. Power Rating and Physical Footprint
The color bands will not tell you if a resistor is rated for 1/8W, 1/4W, or 1/2W. Power dissipation capability is strictly a function of the component's physical mass and surface area. A 10kΩ 1% resistor could be a tiny 0603 SMD package rated for 0.1W, or a massive axial wirewound rated for 5W. Always verify the physical size or manufacturer part number (e.g., Vishay MRS25 for 0.6W axial) before placing it in a high-current path.
2. How Tolerance and Thermal Drift Modify the Base Value
The 5th band tells you the initial tolerance at exactly 25°C. But how do thermal derating rows modify the base value in a hot enclosure? You must look at the Temperature Coefficient of Resistance (TCR), usually specified in ppm/°C (parts per million per degree Celsius) on the datasheet, not the resistor body.
Worked Example: You have a 4.99 kΩ resistor with a 1% tolerance (Brown 5th band) and a TCR of ±50 ppm/°C. At 25°C, it legally measures between 4,940 Ω and 5,040 Ω. If your PCB heats up to 75°C (a ΔT of 50°C), the thermal drift is calculated as: 50 ppm × 50°C = 2500 ppm, which equals a 0.25% shift. Your 4.99 kΩ resistor could now drift an additional 12.5 Ω purely from heat, pushing it closer to the edge of your ADC's error budget.
3. Parasitics and Voltage Coefficient
The chart cannot tell you if the resistor is metal film, thick film, or wirewound. Wirewound resistors possess high parasitic inductance, making them useless for high-frequency RF snubbers despite having perfect color codes. Furthermore, thick film resistors exhibit a Voltage Coefficient of Resistance (VCR), meaning their actual resistance drops slightly as the applied voltage increases—a critical flaw in high-voltage divider networks that the color bands will never warn you about.
Frequently Asked Questions
How do I know which way to read a 5 band resistor?
Look for the spacing gap. The tolerance band (Band 5) is usually printed slightly further away from the other four bands. If the spacing is perfectly uniform, check for a gold or silver band; if present, it must be the multiplier (Band 4), meaning you read from the opposite end. If all bands are evenly spaced and use standard colors (like Brown-Black-Black-Red-Brown), use a digital multimeter to measure the value. If it reads ~10kΩ, your orientation is correct; if it reads ~11kΩ or an error, flip it around.
What is the difference between a 4 band and 5 band color code resistor?
A 4-band resistor provides two significant digits (e.g., 4.7 kΩ) and is typically used for general-purpose E24 series values with 5% or 10% tolerance. A 5-band resistor provides three significant digits (e.g., 4.99 kΩ), allowing it to represent the high-precision E96 series values required for 1%, 0.5%, or 0.1% tolerance applications. You will almost never see a 5-band code on a 5% carbon composition resistor.
Why does my 5 band resistor measure slightly different from the chart value?
If your chart says 10.0 kΩ but your multimeter reads 9.94 kΩ, this is normal and expected. A 1% tolerance means the factory guarantees the value is within ±100 Ω of 10,000 Ω. Furthermore, standard handheld multimeters (like the Fluke 115 or Klein MM400) have their own basic DC accuracy specification of roughly ±0.5% to ±1%. To accurately verify a 1% or 0.1% precision resistor, you must use a 4-wire (Kelvin) measurement method on a benchtop DMM to eliminate test lead resistance from your reading.
Can a 5 band resistor have a gold or silver third band?
No. In the IEC 60062 standard, gold and silver are never used for the first three significant digit bands because they do not represent integers 0-9. If you see a gold or silver band, it is either the multiplier (Band 4, representing ×0.1 or ×0.01) or the tolerance (Band 5, representing 5% or 10%). If a component appears to have gold in the third position, it is likely a 4-band resistor with a spacer gap, or a specialized component like an inductor using a non-standard marking scheme.
