Calculate horizon distance, curvature drop, and hidden height effects
This calculator helps determine the effects of Earth's curvature on visibility, including horizon distance and the amount objects are hidden by curvature.
Try these real-world scenarios to understand Earth's curvature effects
A person standing at sea level looking at the horizon
Observer Height: 1.7 m
Target Distance: 5 km
Target Height: 0 m
Observer on a 30m lighthouse looking at a distant ship
Observer Height: 30 m
Target Distance: 20 km
Target Height: 10 m
Observer on a mountain peak looking at distant terrain
Observer Height: 1000 m
Target Distance: 100 km
Target Height: 50 m
Aircraft flying at cruising altitude
Observer Height: 10000 m
Target Distance: 300 km
Target Height: 0 m