LED Resistor Calculator

Enter value and click on calculate. Result will be displayed.

Enter your values:

Source Voltage:
Volts
Forward LED voltage:
Volts
LED Current:
miliAmps

Result:

Resistor:
Ohms
LED Resistor Calculator

Enter the value and click Calculate. The result will be displayed.

Usage example
Input data:

Power supply voltage: 220V

Forward LED voltage: 120V

LED current: 90A

Output Data:

Resistor: 1.11e+3

Precautions
Supply voltage is greater than forward LED voltage
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