Straight-line distance between two GPS coordinates isn’t a simple Pythagorean calculation — the Earth is curved, and a degree of longitude covers a very different physical distance near the poles than near the equator. The Haversine formula handles that curvature correctly, and this tool runs it instantly.
What Is the Haversine Distance Calculator?
Enter the latitude and longitude of two points and the tool calculates the great-circle distance between them — the shortest path along the Earth’s curved surface, treating it as a sphere — in both kilometers and miles, plus the initial compass bearing you’d need to head in from point A toward point B.
How to Use It
- Open the tool at /tools/haversine-distance-calculator.
- Enter the latitude and longitude for Point A.
- Enter the latitude and longitude for Point B.
- Read the distance in km/miles and the initial bearing, all updating live as you type.
Key Features
- Correct spherical-distance math, not a naive flat-plane approximation.
- Both km and miles shown side by side.
- Initial compass bearing calculated alongside the distance.
- Fully client-side, using only JavaScript trigonometry — no mapping API or network call involved.
When to Use This Tool
- Estimating straight-line distance between two known coordinates for logistics or planning.
- Checking geofencing or proximity logic in a location-aware app.
- Learning how the Haversine formula and great-circle distance work.
Try It Now
Open Haversine Distance Calculator directly, or press ⌘K and type the tool name from anywhere on the site.
Part of the Math & Numbers collection on WebdevToolbox — free, browser-based developer tools with no login required.