LED Resistor Calculator

0
Single LED resistor calculator
Single LED resistor calculator

Voltage in (Vin) V
Forward Voltage (Vf) V
Forward Current (lf) mA

Voltage source too low, must be higher than LED forward voltage
Resistor Ω
Power W

Example

We have an LED with a forward voltage of 2V which requires 20mA (0.02A)
A 9V battery
What size resistor is required?

Answer: 350 Ohm