This calculator helps you find the right resistor value for your LED circuit. By entering your supply voltage, the LED’s forward voltage, and the desired LED current, you get the resistor value needed to keep your LED safe and working well. Using the correct resistor prevents damage and extends the life of your LED.
Try it now to make your LED projects easier and more reliable!
LED Resistor Calculator
Resistor: Ω
Power: W
LED common color correspondence table
| LED Color | Typical Forward Voltage (V) | Notes |
|---|---|---|
| Red | 1.8 – 2.2 | Most common red LEDs |
| Orange | 2.0 – 2.2 | |
| Yellow | 2.0 – 2.4 | |
| Green | 2.0 – 3.5 | Standard or high-brightness LED |
| Blue | 3.0 – 3.5 | High-brightness LEDs ~3.3V |
| White | 3.0 – 3.5 | Usually blue LED with phosphor |
| Infrared | 1.2 – 1.5 | Used for remote controls, sensors |
