About Horizon Distance Calculator
Standing on a beach, the horizon is only about 3 miles (5 km) away. But from an airplane window, it's hundreds of miles away.
The Formula
Distance (km) ≈ 3.57 × √Height (meters)
This assumes a clear view with no atmospheric refraction (which usually lets you see slightly further).
Examples
- 6 ft person: ~3 miles.
- Burj Khalifa (828m): ~100 km (60 miles).
- Plane (35,000ft): ~230 miles.
Usage Instructions
Enter your height above sea level (meters or feet) to see the visible horizon distance.