LED Current Limiting Resistor Calculator is an online electronic tool to measure How much power dissipation would occur on the LED. The Light emitting diode often abbreviated as LED; is a PN junction solid state semi-conductor device emits light when current passing through it. Current Limiting resistance and resistance wattage are the two major aspects to calculate and avoid the LED from damaging. When it comes to online calculation, this LED Resistor Calculator can assist you to find out the values based on the input values of source voltage, voltage drop across LED and desired LED current