Compass Bearing Calculator
Result
Compass Bearing Calculator Find the initial compass bearing (forward azimuth) from one point to another given their latitude and longitude. The bearing is the angle clockwise from true north you'd follow along the great-circle path. Enter the start and en — free online calculator.
Formula
- Compass Bearing Calculator calculates its result from Deltalon, Lat2, Lat1. It uses the formula bearing = atan2(sin(Δlon)·cos(lat2), cos(lat1)·sin(lat2) − sin(lat1)·cos(lat2)·cos(Δlon)). Change any input to recalculate the result instantly.
- The main inputs are Deltalon, Lat2, Lat1. Enter them in the units and format shown in the calculator.
- Keep comparable quantities in compatible units whenever the formula combines or compares them.
- Changing any input above recalculates the result with the same calculation engine used by this page.
Example: Compass Bearing
- Deltalon: 2
- Lat2: 3
- Lat1: 4
Using Deltalon = 2, Lat2 = 3, Lat1 = 4, the calculated result is -1.3315787756.
Sample result: Calculating…
Frequently asked questions
What does the Compass Bearing calculate?
Compass Bearing Calculator Find the initial compass bearing (forward azimuth) from one point to another given their latitude and longitude. The bearing is the angle clockwise from true north you'd follow along the great-circle path. Enter the start and en — free online calculator.
Which values should I enter?
Enter Deltalon, Lat2, Lat1 using the units and format shown beside each field.
What formula does this calculator use?
The calculator uses the following relationship: bearing = atan2(sin(Δlon)·cos(lat2), cos(lat1)·sin(lat2) − sin(lat1)·cos(lat2)·cos(Δlon)).
Why might my result differ from another source?
Results can differ when another source uses different units, rounding rules, conventions or assumptions. Compare the inputs and definitions before comparing results.
Does the result update automatically?
Yes. Changing an input updates the result using the same calculation engine shown on this page.