Great Circle Distance Calculator
Calculate the great-circle (shortest) distance between two geographic coordinates using the Haversine formula.
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Tool guide
Great Circle Distance Calculator: how it works
Practical information to understand the result and use this tool correctly.
About Great Circle Distance Calculator
Calculate the great-circle (shortest) distance between two geographic coordinates using the Haversine formula.
The tool runs directly in the browser for immediate results.
How to use it
- 1Enter the values you want to calculate or process.
- 2The result updates instantly on the same page.
- 3Copy, share, or export the result if the tool allows it.
Frequently asked questions
- Do I need to sign up?
- No. The tool works without an account.
- Are my data uploaded?
- Compatible operations run locally in the browser.
- What is great-circle distance?
- It is the shortest distance over the Earth's surface between two points, following the curve of the sphere. The Haversine formula approximates it with mean Earth radius 6371 km.
- How accurate is the result?
- It uses a spherical Earth model. For most travel planning it is accurate enough. Real geodesic distance (WGS84) can differ slightly for very long routes.