Brown Black Grey Gold — 1 GΩ
Read left to right, starting from the end where the bands are grouped. The gold band is the tolerance and always sits alone at the far end.
Value
1 GΩ
Range at ±5%
950 MΩ – 1.05 GΩ
Standard value
Non-standard
No E24 part carries this value — check you are reading from the right end.
What each band says
| Band | Colour | Meaning |
|---|---|---|
| 1 | Brown | 1st digit — 1 |
| 2 | Black | 2nd digit — 0 |
| 3 | Grey | Multiplier — ×100M |
| 4 | Gold | Tolerance — ±5% |
In a circuit
Across 5 V
0.005 µA · 0.025 µW · 1/8 W part
Across 12 V
0.012 µA · 0.144 µW · 1/8 W part
Surface-mount marking for the same value: 108.
If you misread one band
Brown and red, or orange and red, are easy to confuse under a desk lamp. These are the codes one band away from this one.