Is this Earth Curvature Calculator free to use?

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

How do I use the Earth Curvature 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.

Earth Curvature Calculator — Free Online Tool

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Calculate earth drop and hidden height over distance

Instructions: Enter the distance from the observer and select the unit system to calculate the drop due to Earth's curvature.

Distance Parameters

Distance ($d$)

Distance Unit

⚠️ For geography and physics education reference only. Accounts for standard atmospheric refraction ($R_{eff} \approx \frac{4}{3} R$).

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