Distance & Measurement

Measure distances, areas and perimeters on the Earth's surface with survey-grade formulas.

Measure great-circle distance between any two coordinates with the haversine formula. Free online distance calculator — instant, accurate,…

Find the initial bearing between two GPS coordinates in degrees. Free bearing calculator for navigation, surveying, and antenna…

Calculate the area of any polygon from its corner coordinates. Free area calculator using the equirectangular projection —…