Earth Curvature Calculator
Calculate Horizon Distance & Drop
Calculate how much Earth curves over a given distance and determine the horizon distance from a specific height.
Calculator
Enter height to calculate horizon distance
Formulas:
Drop = d² / (2 × R)
Horizon = √(2 × R × h)
R = Earth radius (6371 km)
About Earth Curvature
Earth's curvature causes distant objects to appear lower than they actually are.
Key Facts:
- Earth radius: ~6,371 km
- Circumference: ~40,075 km
- Drop increases with distance²
Features
- Curvature drop calculation
- Horizon distance
- Multiple units
- Visual representation
- Quick examples
- Copy results
Example Drops
1 km: 7.8 cm drop
10 km: 7.8 m drop
100 km: 785 m drop
1000 km: 78.5 km drop
Applications
Navigation: Line of sight calculations
Surveying: Long-distance measurements
Photography: Landscape visibility
Aviation: Horizon distance
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