Resistor colour coad

 Resistor Colour Code is a way to indicate the resistance value, tolerance, and sometimes reliability of a resistor using coloured bands. Here's a quick guide to the 4-band and 5-band colour code system.

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🎨 Colour Code Table

Colour Digit Multiplier (Ω) 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%

Grey 8 ×100,000,000 ±0.05%

White 9 ×1,000,000,000 –

Gold – ×0.1 ±5%

Silver – ×0.01 ±10%

No Band – – ±20%

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🧮 4-Band Resistor Code

1st Band: 1st digit

2nd Band: 2nd digit

3rd Band: Multiplier

4th Band: Tolerance

🧾 Example: Red (2), Violet (7), Orange (×1000), Gold (±5%)

= 27 × 1000 = 27,000 Ω (27kΩ ±5%)

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🧮 5-Band Resistor Code

1st Band: 1st digit

2nd Band: 2nd digit

3rd Band: 3rd digit

4th Band: Multiplier

5th Band: Tolerance

🧾 Example: Brown (1), Black (0), Red (2), Red (×100), Brown (±1%)

= 102 × 100 = 10,200 Ω (10.2kΩ ±1%)