Haversine Great-Circle Distance Calculator
A free, browser-based calculator. Runs entirely in your browser — no sign up, nothing stored.
100% FreeRuns in your browserIntermediate
Enter Values
Enter your values and press Calculate to see results.
How to use this calculator
- Enter both points' latitude and longitude.
- Press Calculate.
- Read the great-circle distance in km, nautical miles and metres.
How it works
Uses the haversine formula to find the shortest distance over a sphere (radius 6,371 km) between two latitude/longitude points.
Worked example
Perth → Melbourne. ≈ 2,721 km (spherical).
Frequently asked questions
How accurate is haversine?
Within ~0.5% — fine for most uses. For survey-grade distances use the Vincenty ellipsoidal tool.
Related tools
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.