Is this LED Resistor Calculator free to use?

Yes, LED Resistor Calculator is 100% free to use online with no installation or account required.

How do I use the LED Resistor Calculator?

Simply enter your values into the required input fields and click calculate to view the results instantly.

Yes, the calculator is fully responsive and compatible with Android, iOS, Windows, macOS, and Linux web browsers.

LED Resistor Calculator — Free Online Tool

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Calculate LED Resistor results

Note: Enter values below. For educational and estimation purposes — verify critical results with standard references.

Input

Supply Voltage (V)

LED Forward Voltage (V)

LED Current (A)

⚠️ For educational purposes only. Verify results with a qualified professional when making important decisions.