Azimuth Calculator
Use the Azimuth Calculator for a transparent, instant calculation with validated inputs and cited sources. For a query such as “azimuth”, enter the matching values and units below and review the stated assumptions.
How to use this calculator
Enter the requested values and units.
Review the assumptions and any warnings shown with the result.
Use the result together with the cited source and your real-world requirements.
Formula
Compute the initial great-circle bearing with atan2 from the two latitude/longitude points, normalize it to 0–360°, and reject coincident or antipodal cases where a unique initial bearing does not exist.
Worked example
Worked example: Inputs: Start latitude: 40.7128 °; Start longitude: -74.006 °; Destination latitude: 51.5074 °; Destination longitude: -0.1278 °. Outputs: Initial great-circle azimuth: 51.212617 °.
Assumptions and limits
- The result depends on the values, units, and assumptions entered. It does not infer missing context.
Sources
- GeographicLib: Geodesic calculations on an ellipsoid of revolutionReference material reviewed for the stated method, units, or domain. Confirm that its scope matches your use case. Reviewed 2026-08-14.
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Frequently asked questions
How does the Azimuth Calculator work?
Compute the initial great-circle bearing with atan2 from the two latitude/longitude points, normalize it to 0–360°, and reject coincident or antipodal cases where a unique initial bearing does not exist.
What should I enter?
Start latitude, Start longitude, Destination latitude, Destination longitude
What should I verify?
Review the assumptions and any warnings shown with the result. The result depends on the values, units, and assumptions entered. It does not infer missing context.
Last updated 2026-08-14 · reference-azimuth-v2 · opportunity-content-2026-08-14 · Trusty Calculator Editorial Team