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LED Resistor Calculator

Enter LED Requirements:
Source Voltage:  VDC (3.6 - 24.0 Volts)
LED forward voltage (Vf):  VDC
Desired LED operating current:  mA (10 - 50 mA)

Note: If you are using multiple series connected LED's, add the Vf voltages together.

Click to Calculate Current Limiting Resistor

Calculated Results:

You will need a standard  ohm  watt resistor

Resistor Color Code:
Calculated Resistance Value: Ohms
Actual LED Current: mA
Power Dissipated by LED: mW
Power Dissipated by Resistor: mW