Distance Between Two Locations in Physics
Why Coordinate Distance Matters
Distance between two locations is more than a map question. It is also a physics problem. A point on Earth has latitude, longitude, and sometimes altitude. These values define a position on or near a curved surface. When two positions are compared, the calculator estimates the shortest surface path along the globe. This path is called a great circle distance.
Great Circle Thinking
A flat ruler is not enough for long routes. Earth is curved. So the calculator converts degrees into radians. It then finds the central angle between the two points. Multiplying that angle by Earth radius gives the surface distance. This is why the selected radius model can slightly change the answer.
Choosing the Best Method
The Haversine method is a strong general choice. It works well for short and long distances. The spherical law of cosines is compact and useful for many normal routes. The equirectangular approximation is faster, but it is best for shorter distances. The comparison values help you see how methods differ.
Bearing, Midpoint, and Time
Bearing shows the starting direction of travel. It is measured clockwise from north. The midpoint gives a useful reference location between both coordinates. Travel time is found by dividing distance by speed. This estimate is simple. It does not include roads, wind, traffic, slopes, or restricted paths.
Altitude and Real Use
In many physics tasks, altitude can affect the final value. A drone, mountain path, or tower measurement may need vertical difference. This calculator can combine surface distance and altitude difference into a three dimensional estimate. Use it for learning, planning, field notes, and quick reports.