Fresnel Zone Calculator

Use Fresnel Zone Calculator online for practical networking tasks. Fast, free, and runs directly in your browser.

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First Fresnel zone result

Formula and clearance

r₁ = √(λ × d1 × d2 ÷ (d1 + d2)). All distances are converted to meters and λ is the wavelength.

A common guideline uses minimum clearance equal to 60% of the first-zone radius. The diagram is illustrative and is not a terrain elevation profile.

How it works and how to use it

Fresnel Zone Calculator is a free browser-based utility for networking tasks. Enter your data, review the result, and use the available copy or download options where supported.

Processing is performed directly in your browser whenever the tool supports local processing.

Frequently asked questions

Yes. This tool can be used for free without creating an account.

Browser-based processing is performed on your device whenever the tool supports local processing. Avoid entering sensitive data into any online service.

Review the displayed input assumptions and compare important results with the requirements of your project, institution, or applicable standard.

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