Measure the shortest surface distance between two points
The calculator resolves the two places or coordinate pairs and applies the Haversine formula to estimate the great-circle distance between them. This is the shortest path along a spherical Earth model, not the length of a road, trail, flight plan or property boundary.
See the same result in several units
The result is displayed in kilometers, meters, statute miles and nautical miles so you can use the unit that fits the task without recalculating elsewhere. Converting the unit does not change the underlying measured path between the two coordinates.
Initial bearing shows the starting compass direction
The bearing is the direction from the first point toward the second at the start of the great-circle path. Because a great-circle route can curve relative to a map projection, that initial direction is not necessarily the same heading for the entire journey.
Use coordinates for repeatable comparisons
When you already know the exact latitude and longitude of both points, entering the coordinates avoids uncertainty from place-name matching. If you search by address or place name, inspect the map markers first because the geocoder may select a nearby or broader match.
Know when a straight-line result is the wrong measurement
Use a routing service when you need drivable or walkable distance. Use professional GIS, geodesy or surveying methods when legal boundaries, engineering tolerances or centimeter-level precision matters. This calculator is intended for general geographic distance comparisons.
Earth models and rounding affect precision
The Haversine formula is reliable for ordinary global distance estimates, but it simplifies Earth’s shape. Displayed decimal places should not be interpreted as proof that the source coordinates were measured to the same precision.