LED Resistor Calculator

Prevent blown LEDs by finding the perfect series resistor for your circuit.

1. LED Presets
Select LED Color
2. Circuit Specs
Supply Voltage V
Forward Voltage V
Forward Current mA
Number of LEDs
Ideal Resistance
285
Ohms (Ω)
300 Ω Nearest Standard
(E12 Series)
0.11 W Resistor Power
Dissipation
Color Band Guide

Color Code: Orange - Black - Brown