How it works
Use the haversine formula on a sphere with mean Earth radius 6,371.0088 km. This gives surface distance along the shorter great-circle arc.
Input definitions
- First latitude (degrees)
- Enter the value in the labeled unit.
- First longitude (degrees)
- Enter the value in the labeled unit.
- Second latitude (degrees)
- Enter the value in the labeled unit.
- Second longitude (degrees)
- Enter the value in the labeled unit.
A worked example
- First latitude (degrees)
- 0
- First longitude (degrees)
- 0
- Second latitude (degrees)
- 0
- Second longitude (degrees)
- 90
Assumptions & limits
Use consistent stated units. Ideal geometric or physical model; verify dimensions and applicability before real-world design.
Sources & review
Maintained by AnsRio. Methods and examples use automated checks; this does not imply independent professional certification.
Method updated 2026-10-17. Content checked against the stated method and examples. Our verification approach.
Common questions
Is this the driving distance?
No. It is a spherical surface distance between coordinates. Route length, navigation and surveyed distances require a suitable routing or geodesy service.
How does Great-circle distance between coordinates work?
Use the haversine formula on a sphere with mean Earth radius 6,371.0088 km. This gives surface distance along the shorter great-circle arc.
What are the limits of Great-circle distance between coordinates?
Use consistent stated units. Ideal geometric or physical model; verify dimensions and applicability before real-world design.