Four bands, gold
- Input
- red-red-brown-gold
- Expected output
- 220R ±5%
The most familiar layout: 22 × 10 = 220 Ω, from 209 to 231 Ω.
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220 ohm resistor color code
For 220 Ω the short answer is red, red, brown, gold. Two reds make the number 22, brown multiplies by 10 and gold says ±5%. The calculator opens with that combination already set, and the page shows how the same value looks with three and five bands.
The most familiar layout: 22 × 10 = 220 Ω, from 209 to 231 Ω.
Only the last color changes, now meaning ±10% and widening the window to 198 to 242 Ω.
220 × 1 = 220 Ω with one more digit, and the window drops to 217.8 to 222.2 Ω.
No tolerance band: the same 220 Ω, but at ±20%, from 176 to 264 Ω.
Typing 220 into the calculator brings up the colors, with gold tolerance by default on four bands.
Start from the end opposite the tolerance band. The tolerance band is usually gold or silver (or visibly set apart from the rest with a wider gap), so it's always read last, and tells you which end to begin at.
On four bands, red, red, brown and a tolerance band (gold for ±5%). On five bands, red, red, black, black and brown.
Only the third band. Brown (×10) gives 220 Ω and red (×100) gives 2,200 Ω. The two digits are identical, 2 and 2.
Yes. The ±5% window runs from 209 Ω to 231 Ω, and 225 Ω sits inside it.
About 14.5 mA, assuming a 1.8 V LED drop: (5 − 1.8) / 220. The real figure depends on your LED's drop, which the LED resistor calculator lets you adjust.
This is a standard E24 value (typical tolerance ±5%).
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