LED Resistor Calculator

Calculate the right resistor for your LED circuit with color presets

💡
LED Resistor Calculator

LED Color Preset

Supply Voltage (Vs) in Volts

LED Forward Voltage (Vf)

LED Current (If) in mA

Number of LEDs in Series

Required Resistor

—

Nearest Standard Value

—

Power Dissipation

—

R = (Vs - n*Vf) / If, where Vs = supply voltage, Vf = LED forward voltage, If = LED forward current, n = number of LEDs in series.