Is this Diffraction Grating Calculator free to use?

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

How do I use the Diffraction Grating 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.

Diffraction Grating Calculator — Free Online Tool

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Calculate the diffraction angle using the grating equation

Instructions: Enter the slit separation ($d$), light wavelength ($\lambda$), and order ($n$) to calculate the diffraction angle ($\theta$).

Grating and Light Parameters

Slit Separation ($d$, µm)

Wavelength ($\lambda$, nm)

Diffraction Order ($n$)

⚠️ For optics education and physics reference only. Ensure $n\lambda \le d$ for a valid diffraction maximum.

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