LED Series Resistor Calculator

Calculate the ideal series resistor for your LED circuit with our efficient online calculator. Ensure optimal current limiting and prevent overdriving your LED using this user-friendly tool.

This online electrical calculator assists in calculating the resistance of an LED resistor circuit using Ohm’s Law. By inputting the relevant values, you can easily determine the appropriate resistance required for the circuit. Simplify your LED circuit design and ensure proper current limiting with the help of this convenient online calculator based on Ohm’s Law.

Supply Voltage (Vs)
Voltage Drop (Vd)
Forward Current (If)
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    6 Number of calculations
    R = \frac{{V_s - V_d}}{{I_f}}


    • R = Resistance,
    • Vs = Supply Voltage,
    • Vd = Voltage Drop,
    • If = Forward Current