The resistance color code chart is your translation key for axial leaded resistors, mapping colored bands to exact ohmic values, multipliers, and tolerances per the IEC 60062 international standard. Whether you are reading a legacy 4-band carbon film resistor or a modern 6-band metal film precision part, the chart below provides the exact numeric breakdown. For 95% of general-purpose bench and DIY builds, you will default to a 5-band, 1% metal film resistor (such as the Yageo MFR-25 series), using the first three bands for digits, the fourth for the multiplier, and the fifth for tolerance.
How to Read the Chart and Quick-Jump Values
To read the resistance color code chart correctly, you must first identify the band format. The chart is divided into functional columns: Significant Digits (the first 2 or 3 bands), the Multiplier (which tells you how many zeros to add), the Tolerance (the acceptable deviation from the nominal value), and the Temperature Coefficient (how much the value drifts with heat). Always read the bands starting from the end closest to the lead; the tolerance band (usually Gold, Silver, or Brown) is typically spaced slightly further apart on the right side.
These are the most queried values on the workbench. Memorize these digit combinations to speed up your troubleshooting:
- 220Ω: Red (2) - Red (2) - Brown (x10)
- 1kΩ: Brown (1) - Black (0) - Red (x100)
- 4.7kΩ: Yellow (4) - Violet (7) - Red (x100)
- 10kΩ: Brown (1) - Black (0) - Orange (x1,000)
- 100kΩ: Brown (1) - Black (0) - Yellow (x10,000)
The Master Resistance Color Code Chart (IEC 60062 Standard)
The following table is the complete, unabbreviated reference based on the IEC 60062 and EIA RS-279 standards. Note that the '3rd Digit' column only applies to 5-band and 6-band precision resistors. If you are reading a standard 4-band resistor, skip the 3rd Digit column entirely and use the second band as your final digit before applying the multiplier.
| Color | 1st Digit | 2nd Digit | 3rd Digit (5/6 Band) | Multiplier | Tolerance | Temp Coefficient (ppm/K) |
|---|---|---|---|---|---|---|
| Black | 0 | 0 | 0 | ×1Ω | - | 250 |
| Brown | 1 | 1 | 1 | ×10Ω | ±1% (F) | 100 |
| Red | 2 | 2 | 2 | ×100Ω | ±2% (G) | 50 |
| Orange | 3 | 3 | 3 | ×1kΩ | - | 15 |
| Yellow | 4 | 4 | 4 | ×10kΩ | - | 25 |
| Green | 5 | 5 | 5 | ×100kΩ | ±0.5% (D) | - |
| Blue | 6 | 6 | 6 | ×1MΩ | ±0.25% (C) | 10 |
| Violet | 7 | 7 | 7 | ×10MΩ | ±0.1% (B) | 5 |
| Grey | 8 | 8 | 8 | - | ±0.05% (A) | - |
| White | 9 | 9 | 9 | - | - | - |
| Gold | - | - | - | ×0.1Ω | ±5% (J) | - |
| Silver | - | - | - | ×0.01Ω | ±10% (K) | - |
Source: IEC 60062 / EIA RS-279. For interactive verification, cross-reference with the All About Circuits Calculator or Electronics Tutorials.
Decision Path: Choosing Your Band Format
Do not just buy whatever is cheapest in the bulk bin. The number of bands on a resistor dictates its precision and stability. Use this decision matrix to select the exact component class for your circuit.
| Application Scenario | Band Format | Required Tolerance | Concrete Part Recommendation |
|---|---|---|---|
| LED current limiting, I2C pull-ups, basic logic biasing | 4-Band | ±5% (Gold) | Yageo CFR-25 (1/4W Carbon Film) |
| Op-amp feedback, ADC voltage dividers, audio crossovers | 5-Band | ±1% (Brown) | Vishay PR02 (1W Metal Film) or Yageo MFR-25 |
| RTD simulation, high-stability oscillators, medical sensors | 6-Band | ±0.1% (Violet) + Tempco | Susumu RG Series (Thin Film) or Vishay Z-Foil |
The Default Pick: If you are stocking a new workbench and want to minimize inventory while maximizing capability, buy a 5-band, 1% metal film resistor kit (like the Xicon or Yageo MFR-25 1/4W kits). They cover 99% of hobbyist and prototyping needs, and their 1% tolerance is tight enough for analog work without the premium cost of 0.1% precision parts.
How Tolerance and Tempco Modify the Base Value
The nominal value printed on a schematic or calculated via the color code is an idealization. The tolerance and temperature coefficient (tempco) bands tell you how far the real-world component will deviate from that ideal.
Tolerance Math: Take a 4.7kΩ resistor with a Gold (±5%) tolerance band. The nominal value is 4,700Ω. To find the acceptable range, multiply the nominal value by the tolerance: 4,700 × 0.05 = 235Ω. This specific resistor will measure anywhere between 4,465Ω and 4,935Ω at room temperature. If your circuit requires exactly 4,700Ω to trigger a comparator threshold, a 5% part will cause field failures. You must step up to a 1% (Brown band) part, which restricts the range to 4,653Ω - 4,747Ω.
Temperature Coefficient (Tempco) Derating: Found only on 6-band resistors, the tempco is measured in parts per million per degree Celsius (ppm/°C). If you have a 10kΩ resistor with a 50 ppm/°C tempco, and the ambient temperature rises by 20°C above the 25°C baseline, the value shifts by: 10,000Ω × (50 / 1,000,000) × 20 = 10Ω. The resistor will now measure 10,010Ω. While 10Ω seems trivial, in a high-gain transimpedance amplifier or a precision Wheatstone bridge, this thermal drift will introduce massive measurement errors.
What the Color Code Chart Cannot Tell You
The IEC 60062 color code is strictly a map for resistance, multiplier, tolerance, and thermal drift. It completely omits three critical parameters that will destroy your circuit if ignored:
- Power Rating (Wattage): A 10kΩ 1/4W carbon film resistor and a 10kΩ 5W ceramic wirewound resistor share the exact same color code (Brown-Black-Orange). The color code does not scale with physical size. You must determine the power rating by measuring the physical dimensions of the resistor body (e.g., a 1/4W axial is typically 6.3mm long, while a 1/2W is 9mm long) or by reading the manufacturer's datasheet.
- Maximum Working Voltage: Every resistor has a dielectric breakdown limit. A standard 1/4W axial resistor is typically rated for a maximum of 250V across its leads. If you use a 1MΩ 1/4W resistor to drop 400V DC from a tube amplifier power supply, the voltage will arc internally through the resistive film, causing a catastrophic short, regardless of whether the power dissipation (P = V²/R = 0.16W) is technically under the 1/4W limit.
- Parasitic Inductance and Capacitance: Wirewound power resistors are essentially coils of wire. At DC or 60Hz, they act as pure resistors. At 10MHz RF frequencies, their parasitic inductance turns them into chokes, completely altering circuit impedance. For high-frequency or fast-switching digital circuits, you must ignore wirewound types and specifically select thick-film or metal-film resistors, which have near-zero parasitic inductance.
Always pair your color code reading with a physical inspection of the component's size and a quick check of its datasheet for voltage and parasitic limits.
