Calculate Distance Between Two Coordinates
Enter latitude and longitude for Point A and Point B. The tool returns straight-line (great-circle) distance plus heading details.
Point A
Point B
Tip: Coordinates use decimal degrees. Negative latitude = south, negative longitude = west.
What this geo distance calculator does
A geo distance calculator measures the shortest path between two locations on Earth using latitude and longitude. This path is called the great-circle distance, which is more accurate than a flat-map estimate. Whether you are planning travel, estimating delivery range, analyzing drone routes, or building location-based software, this tool helps you get a fast and reliable answer.
How the calculation works
Behind the scenes, the calculator uses the Haversine formula, a standard method for calculating distance over a spherical Earth model. It takes the two coordinate pairs, converts degrees to radians, and computes the arc length between points on the globe.
Outputs included
- Primary distance in your chosen unit (km, miles, or nautical miles)
- Distance shown in all units for comparison
- Initial bearing from Point A toward Point B
- Approximate midpoint coordinate between the two points
Why great-circle distance matters
Many people estimate distance with a ruler-style map view. That approach can be significantly off across long routes, especially near poles or across oceans. Great-circle math follows Earth’s curvature, giving more realistic numbers for:
- Aviation and maritime planning
- International route estimation
- Geofencing and location analytics
- Emergency response and logistics modeling
Coordinate entry tips for best accuracy
1) Use decimal degrees
Enter values like 34.0522 and -118.2437. If you have DMS format (degrees/minutes/seconds), convert it first.
2) Check sign conventions
- North latitude: positive
- South latitude: negative
- East longitude: positive
- West longitude: negative
3) Understand what this is (and isn’t)
The calculator returns straight-line geodesic distance, not driving distance and not terrain-aware hiking distance. For roads, use a routing engine. For air/sea baseline estimates, this is exactly what you want.
Example use case
Suppose you need a quick estimate from New York City to London for a planning brief. Load the built-in example and click calculate. You will instantly get:
- Direct air distance
- Equivalent miles and nautical miles
- Initial heading and midpoint
That single result can power budget approximations, ETA modeling, fuel assumptions, and dashboard comparisons.
Frequently asked questions
Is this suitable for GIS work?
Yes for quick calculations and many product workflows. For high-precision surveying or ellipsoid-specific geodesics, specialized GIS libraries may be preferable.
Does Earth shape affect the result?
Slightly. This tool uses a common mean Earth radius, which is excellent for general-purpose calculations and most software applications.
Can I use this for shipping or flight estimates?
Absolutely as a baseline. Just remember operational routes may differ due to weather, restrictions, lanes, and waypoints.