4 Band, 5 Band & 6 Band Resistor Color Code Calculator (Value finder)

4 Band, 5 Band & 6 Band Resistor Color Code Calculator (Value Finder)

In electronics, resistors are one of the most common and important components. They control the flow of current and protect circuits from excessive current. Every resistor has colored bands printed on its body that represent its resistance value (ohms) and tolerance.

Resistor Calculator

Select bands, choose colors, get result

Number of Bands

4 Bands

5 Bands

6 Bands

Select Colors

0

Ω

±20%

0

1

2

3

4

5

6

7

8

9

5%

10%

This guide will help you read and calculate resistor values using 4-band, 5-band, and 6-band color codes — along with a free online Resistor Color Code Calculator tool.

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🟩 1. Understanding Resistor Color Bands

Each color on a resistor corresponds to a specific number. The number of bands (4, 5, or 6) determines how many digits or multipliers are used to calculate the total resistance value.

Color	Number	Multiplier	Tolerance
Black	0	×1	—
Brown	1	×10	±1%
Red	2	×100	±2%
Orange	3	×1,000	—
Yellow	4	×10,000	—
Green	5	×100,000	±0.5%
Blue	6	×1,000,000	±0.25%
Violet	7	×10,000,000	±0.1%
Gray	8	×100,000,000	±0.05%
White	9	—	—
Gold	—	×0.1	±5%
Silver	—	×0.01	±10%
None	—	—	±20%

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🟨 2. 4-Band Resistor Color Code

A 4-band resistor has:

• 2 color bands for digits

• 1 for multiplier

• 1 for tolerance

Example:
Red (2), Violet (7), Orange (×1,000), Gold (±5%)
→ 27 × 1,000 = 27,000 Ω = 27kΩ ±5%

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🟦 3. 5-Band Resistor Color Code

A 5-band resistor has:

• 3 digits

• 1 multiplier

• 1 tolerance

Example:
Brown (1), Black (0), Red (2), Orange (×1,000), Brown (±1%)
→ 102 × 1,000 = 102kΩ ±1%

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🟧 4. 6-Band Resistor Color Code

A 6-band resistor includes:

• 3 digits

• 1 multiplier

• 1 tolerance

• 1 temperature coefficient (ppm/°C)

Example:
Red (2), Violet (7), Brown (1), Orange (×1,000), Brown (±1%), Blue (10 ppm/°C)

→ 271 × 1,000 = 271kΩ ±1% (Temp Coefficient: 10ppm/°C)

6. Tips for Accurate Reading

• Always start reading from the side where bands are closer together.

• Use a magnifier or light if colors are hard to distinguish.

• Remember that temperature coefficient is used mainly in precision resistors.

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Conclusion

By understanding and using resistor color codes, you can easily determine the correct resistance value for any circuit. Whether you’re working on PCB repair, home electronics, or educational projects, this calculator will save you time and prevent circuit errors.

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#ResistorColorCode #ElectronicsCalculator #ResistorValueFinder #ElectricalTools #PCBRepair #ElectronicProjects