Is this LM317 Calculator free to use?

Yes, LM317 Calculator is 100% free to use online with no installation or account required.

How do I use the LM317 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.

LM317 Calculator — Free Online Tool

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Calculate output voltage for LM317 adjustable voltage regulator

Formula: $V_{\text{out}} = 1.25 \times \left(1 + \frac{R_2}{R_1}\right) + (I_{\text{adj}} \times R_2)$. Enter resistor values below.

Circuit Parameters

Resistor R1 (Ω)

Resistor R2 (Ω)

Adjustment Current ($I_{\text{adj}}$, µA)

⚠️ For electronics design, circuit prototyping, and educational reference purposes only.

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