Earth curvature calculator

An Earth curvature calculator estimates how much the Earth's surface curves over a given distance. It uses the Earth's approximate radius and the distance you’re interested in to determine the drop in elevation or the hidden portion behind the horizon. For example, over 10 miles, the surface drops about 8 inches. The calculator helps understand the curvature’s effect on visibility, navigation, and structures, showing how the horizon appears lower as you look further away, due to Earth’s round shape.