LED Circuit: 3V, 150Ω Resistor
In a 3 V LED circuit with a 150 Ω resistor, the current is 0.02 A (20 mA), typical for standard LEDs.
How to use this tool
- Enter voltage (v), current (i) and resistance (r) in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your voltage and the full breakdown beneath it.
Calculate the current in a basic LED circuit with a 150 Ω current-limiting resistor and 3 V supply.
Frequently asked questions
- What units are used?
- Volts (V) for voltage, Amperes (A) for current, Ohms (Ω) for resistance, and Watts (W) for power. Keep units consistent.
- Does Ohm's Law apply to AC circuits?
- For pure resistors, yes. For capacitors and inductors you need impedance Z (complex resistance), and V = IZ replaces V = IR.