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LED Resistor Value Calculator

When we use LEDs in circuits we always use a series resistor. We've made it even easier for you to calculate the value of this resitor with our LED calculator below. You can also watch this video where Kevin explains why we always use a series resistor, and explains how to calculate the value of the resistor.

 

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8 thoughts on “LED Resistor Value Calculator”

  • H, ref. resistor calculator, is it giving me the resistor per led or single resistor for how many leds in the circuit

    Reply
  • Hi want to make parallel red led (20 LEDs) design which running on 12v bike battery. Pls suggest me exact resistor value and help to make correct circuit.
    Thank you

    Reply
    • Without knowing the specifications of the LEDs it is impossible to say.

      Reply
      • 20 ea Diode Red LEDs approx 2v each, I want to make parallel design which running on 12v battery for my bike indicators. Pls suggest Resistance value..

        Reply
  • Use 20 ea Diode Red LEDs approx 2v each, I want to make parallel design which running on 12v battery for my bike indicators. Pls suggest Resistance value..
    Pls help

    Reply
  • Hi i got a 3volt 1w led torch globe.. If i connect it to a 6volt battery... Will it burn out....

    Reply
    • Hi Jerrard, it's always best to go with the manufacturer's guidance. If it says it requires a 3V supply, it is best to use a 3V supply.

      Reply
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