Tools/LED Resistor Calculator

LED Resistor Calculator

Calculate current limiting resistor for LEDs

Input Parameters

Supply Voltage (V)

LED Color

Custom Vf (optional)

LED Current (mA)

Number of LEDs

Connection

+5V

R

GND

Results

Recommended Resistor

150.0 Ω0.125W

Calculated: 150.0 Ω

Actual Current

20.0 mA

Power Loss

60.0 mW

Total Vf

2.0 V

Power Rating

0.125 W

LED Forward Voltage

Red

2V

Orange

2.1V

Yellow

2.1V

Green

2.2V

Blue

3.2V

White

3.2V

UV

3.4V

IR

1.5V

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