Signals lab
Grid squares & bearings
Convert coordinates and Maidenhead locators, then calculate a great-circle distance and initial true bearing between grid-square centers.
Coordinates to grid square
—
Path between grid squares
Locators identify areas, not exact station positions. Calculations use their cell centers, a spherical Earth of mean radius 6,371.0088 km, and initial bearings relative to true north. This is not a magnetic bearing or an indication of a viable radio path. Inputs stay on this device.
IARU Region 1 locator reference ↗