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Compass Bearing Calculator - Online Azimuth Between Lat/Lon

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Compass Bearing Calculator

Calculate azimuth and distance between two points on Earth using latitude & longitude

Point A (From)
Latitude must be between -90 and 90
Longitude must be between -180 and 180
Point B (To)
Latitude must be between -90 and 90
Longitude must be between -180 and 180

Frequently Asked Questions

A compass bearing (or azimuth) is the horizontal angle measured clockwise from true north to a target direction. It ranges from 0° (North) to 360°, such as 90° for East and 180° for South.

We use spherical trigonometry: bearing = atan2( sin(Δλ) * cos(φ2), cos(φ1)*sin(φ2) − sin(φ1)*cos(φ2)*cos(Δλ) ). This gives the initial forward bearing along a great circle path.

The initial bearing is the direction you start traveling along a great circle. The final bearing differs because the path curves on the sphere. This tool shows the initial compass bearing.

We use the Haversine formula to compute great‑circle distance between two lat/lon points, assuming a spherical Earth with radius 6371 km. Results are displayed in kilometers and miles.

Yes, for basic planning. However, magnetic declination must be accounted for separately if navigating with a magnetic compass. This tool provides true bearings.

Decimal degrees only (e.g., 40.7128 for latitude). Both negative west longitudes and negative south latitudes are supported. Do not use degrees/minutes/seconds.

Minor differences can occur due to Earth model (spherical vs ellipsoidal) or rounding. The Haversine formula provides accuracy within 0.5% for all terrestrial distances.
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