Actual value by tolerance
| Tolerance | Band | Minimum | Maximum |
|---|
| ±1% | Brown | 17.82 kΩ | 18.18 kΩ |
| ±2% | Red | 17.64 kΩ | 18.36 kΩ |
| ±5% | Gold | 17.1 kΩ | 18.9 kΩ |
| ±10% | Silver | 16.2 kΩ | 19.8 kΩ |
SMD and printed codes
| SMD, 3 digits | 183 |
|---|
| SMD, 4 digits | 1802 |
|---|
| SMD, EIA-96 | not used for this value |
|---|
| Letter code (IEC 60062) | 18K |
|---|
Current and power at common voltages
| Voltage | Current | Power | Resistor rating |
|---|
| 3.3 V | 183 µA | 605 µW | 1/8 W |
| 5 V | 278 µA | 1.39 mW | 1/8 W |
| 9 V | 500 µA | 4.5 mW | 1/8 W |
| 12 V | 667 µA | 8 mW | 1/8 W |
| 24 V | 1.33 mA | 32 mW | 1/8 W |
As an LED resistor
Current through one LED in series with 18 kΩ:
| Supply | Red LED (2.0 V) | White or blue LED (3.2 V) |
|---|
| 3.3 V | 0.0722 mA | 0.00556 mA |
| 5 V | 0.167 mA | 0.1 mA |
| 12 V | 0.556 mA | 0.489 mA |
LED Resistor Calculator →
Standard series
18 kΩ 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 18 kΩ resistor?
On a 4-band resistor: brown, grey, orange, gold. On a 5-band resistor: brown, grey, black, red, brown.
What is the SMD code for 18 kΩ?
183 on 3-digit resistors and 1802 on 4-digit (1%) resistors.
How much current flows through a 18 kΩ resistor at 5 V?
278 µA, dissipating 1.39 mW. A 1/8 W resistor is enough.
Which resistors get mixed up with 18 kΩ?
brown, grey, red, gold is 1.8 kΩ and brown, grey, yellow, gold is 180 kΩ: only the third band changes, so check it carefully.
