Use this geographic calculation to derive a spherical distance, bearing, destination, or coordinate envelope from well-formed latitude and longitude values.

Start latitude

Latitude of the start point in decimal degrees.

Start longitude

Longitude of the start point in decimal degrees.

End latitude

Latitude of the end point in decimal degrees.

End longitude

Longitude of the end point in decimal degrees.

Calculate the initial forward azimuth in degrees from a start point to an end point on a spherical Earth. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Initial bearing (deg)

Initial bearing measured clockwise from true north, in degrees within [0, 360).

• The result depends on the chosen Earth model and longitude handling. Bounding boxes near the antimeridian or poles and long geodesics need special treatment, and altitude is normally omitted.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check the result on a map and use ellipsoidal geodesics or a suitable projected CRS when accuracy or area preservation matters.

• Destination Point Calculator

  Compute the destination latitude and longitude reached when traveling a given distance from a start point along a fixed initial bearing on a spherical Earth of mean radius 6371008.8 m.

• Geographic Bounding Box Calculator

  Compute the latitude and unwrapped longitude extents of a radius around a center point on a spherical Earth of mean radius 6371008.8 m. Longitude bounds may fall outside −180° to 180° when the interval crosses the antimeridian.

• Haversine Distance Calculator

  Calculate the great-circle distance between two points on a spherical Earth of mean radius 6371008.8 m using the haversine formula.