Haversine Distance Calculator

Summary

Calculate the great-circle distance between two geographic coordinates using the Haversine formula.

How it works

1. Enter the latitude and longitude for Point A in decimal degrees (e.g. 40.7128, -74.0060).
2. Enter the latitude and longitude for Point B in decimal degrees.
3. Click Calculate to apply the Haversine formula: a = sin²(Δlat/2) + cos(lat1)·cos(lat2)·sin²(Δlon/2).
4. The central angle c = 2·atan2(√a, √(1−a)) is multiplied by Earth's mean radius (6371 km).
5. Results are displayed in kilometers, miles, and nautical miles.
6. Use the city presets or paste coordinates directly from a map application.

Use cases

• Calculate straight-line distance between two cities for travel planning.
• Verify GPS distances in geospatial software development.
• Understand spherical trigonometry in a hands-on, visual way.
• Compute proximity between two points for logistics and delivery routing.
• Check coverage radius for antennas, cell towers, or service zones.
• Educational demonstrations of great-circle geometry in geography courses.
• Cross-validate distances computed by mapping APIs.
• Estimate fuel requirements for aviation or maritime routes.

Frequently Asked Questions