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Electrical / LEDs
LED Resistor Calculator
Find the series resistance and resistor wattage for a single LED or an LED string.
LED string
Current and resistor series
Resistor result
Recommended E24 resistor300 Ω
Calculated minimum: 300 Ω
- Resistor dissipation
- 0.12 W
- Recommended rating
- 0.25 W
- Resistor voltage drop
- 6 V
- LED string voltage
- 6 V
LED forward voltage varies with device, current and temperature. Use the manufacturer’s data and allow practical design margin.