Calculate how far you can see based on your elevation.
Elevation Parameters
m
Calculation Results
Enter your height to see the horizon
About this calculator
Quick Reference
dDistance to Horizon
REarth Radius (6,371 km)
hHeight of observer
Refraction≈1.08x Geometric distance
Overview
The distance to the horizon is limited by the curvature of the Earth. As you climb higher, the horizon moves further away. Atmospheric refraction typically allows you to see slightly further than the geometric line of sight.
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Pro Tips
The refracted distance includes standard atmospheric bending of light (about 8% further).
Calculations assume a perfectly spherical Earth with radius R = 6,371 km.
Extreme weather conditions can significantly change the visual distance (mirages).
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Fun Facts
"For a person standing on a beach with eyes at 1.7m, the horizon is surprisingly close—only about 4.7 km away."
"From the top of Mount Everest (8,848m), the horizon is roughly 336 km away."
"The 'Looming' effect occurs when atmospheric refraction is high, letting you see objects normally hidden behind the horizon."
