Horizon Distance Calculator
Enter eye height above a clear, level surface to estimate the geometric horizon. Compare line-of-sight and surface distances without atmospheric refraction.
Example: eyes 1.7 m above the water, standing at the shoreline. Type your own eye height over it.
4.654 km to the horizon
Surface distance on a spherical Earth for an eye height of 1.7 m. The straight line from your eye to the horizon is 4.654 km (2.892 miles).
This geometric guide assumes a clear, level surface. It does not predict visibility through terrain, buildings or the atmosphere.
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