LED Resistor Calculator
Calculate a safe series resistor, resistor power, and a standard value. Enter Supply voltage (V), LED forward voltage (V), LED current (mA) and LEDs in series to get Resi
Parameters
Enter the required details below
Ready to Calculate
Enter your parameters and click calculate to see the results here.
How to Use
- Enter Supply voltage (V).
- Enter LED forward voltage (V).
- Enter LED current (mA).
- Click Calculate to see Resistance, Power and Standard resistor.
- Check the result. Use Reset if you want to try different numbers.
About This Calculator
Calculate a safe series resistor, resistor power, and a standard value. This tool is in the Education & Science collection on Qalculators. Enter Supply voltage (V), LED forward voltage (V), LED current (mA) and LEDs in series to calculate Resistance, Power and Standard resistor. Results stay in your browser unless you copy them.
Frequently asked questions
What does LED Resistor Calculator calculate?+
Calculate a safe series resistor, resistor power, and a standard value. You enter Supply voltage (V), LED forward voltage (V), LED current (mA) and LEDs in series and receive Resistance, Power and Standard resistor.
What information do I need for LED Resistor Calculator?+
You need Supply voltage (V), LED forward voltage (V), LED current (mA) and LEDs in series. Optional fields can stay at their defaults.
Is LED Resistor Calculator free to use?+
Yes. LED Resistor Calculator is free and does not require an account. The calculation runs in your browser.
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