LED Resistor Calculator
Calculate the correct current-limiting resistor value for LEDs. Enter supply voltage, LED forward voltage, and desired current. Supports series and parallel configurations with multiple LEDs and power dissipation calculation.
How to Use LED Resistor Calculator
Enter the supply voltage, LED forward voltage drop, and desired LED current in milliamps. Set the number of LEDs and connection type (series or parallel). Click Calculate to get the required resistor value, nearest standard value, actual current, and power dissipation.
Step-by-Step Instructions
- Enter supply voltage and LED forward voltage
- Set desired current in mA
- Choose number of LEDs and connection type
- Click Calculate to see resistor value and power rating
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