Actual value by tolerance
| Tolerance | Band | Minimum | Maximum |
|---|
| ±1% | Brown | 1.782 MΩ | 1.818 MΩ |
| ±2% | Red | 1.764 MΩ | 1.836 MΩ |
| ±5% | Gold | 1.71 MΩ | 1.89 MΩ |
| ±10% | Silver | 1.62 MΩ | 1.98 MΩ |
SMD and printed codes
| SMD, 3 digits | 185 |
|---|
| SMD, 4 digits | 1804 |
|---|
| SMD, EIA-96 | not used for this value |
|---|
| Letter code (IEC 60062) | 1M8 |
|---|
Current and power at common voltages
| Voltage | Current | Power | Resistor rating |
|---|
| 3.3 V | 1.83 µA | 6.05 µW | 1/8 W |
| 5 V | 2.78 µA | 13.9 µW | 1/8 W |
| 9 V | 5 µA | 45 µW | 1/8 W |
| 12 V | 6.67 µA | 80 µW | 1/8 W |
| 24 V | 13.3 µA | 320 µW | 1/8 W |
As an LED resistor
Current through one LED in series with 1.8 MΩ:
| Supply | Red LED (2.0 V) | White or blue LED (3.2 V) |
|---|
| 3.3 V | 0.000722 mA | 0.0000556 mA |
| 5 V | 0.00167 mA | 0.001 mA |
| 12 V | 0.00556 mA | 0.00489 mA |
LED Resistor Calculator →
Standard series
1.8 MΩ is a standard value in the E12, E24 series, so it comes in almost every resistor kit.
Nearby values
Same first two colors, different multiplier:
Frequently asked questions
What are the colors of a 1.8 MΩ resistor?
On a 4-band resistor: brown, grey, green, gold. On a 5-band resistor: brown, grey, black, yellow, brown.
What is the SMD code for 1.8 MΩ?
185 on 3-digit resistors and 1804 on 4-digit (1%) resistors.
How much current flows through a 1.8 MΩ resistor at 5 V?
2.78 µA, dissipating 13.9 µW. A 1/8 W resistor is enough.
Which resistors get mixed up with 1.8 MΩ?
brown, grey, yellow, gold is 180 kΩ and brown, grey, blue, gold is 18 MΩ: only the third band changes, so check it carefully.
