LED Series Resistor Calculator
Easily determine the perfect resistor value for your LED circuit with just a few clicks. Input your desired current and voltage, and let our tool suggest matching E series resistors to ensure optimal performance and longevity for your light-emitting diodes.
Used Formula:
Common forward voltages:
| Red | 1.6V to 2.2V |
| Green | 1.9V to 3.2V |
| Blue | 2.9V to 3.7V |
| Yellow | 1.9V to 2.2V |
| White | 3.0V to 3.4V |
| Orange | 1.9V to 2.2V |
For regular LEDs 20mA is good starting point. Consult your datasheet for exact values.