LED Resistor Calculator

Assumes one resistor per LED string. Sharing one resistor across parallel LEDs can make brightness and current uneven.
Suggested standard resistor
150 Ω
Required resistor: 150 Ω · Suggested rating: 0.125 W
Voltage across resistor
3 V
Resistor power
0.06 W
Total current
20 mA
LED power
0.04 W