BearingCalc

BearingCalc gives you the initial bearing and the great-circle distance between any two coordinates, plus the midpoint between them. Type both latitude and longitude pairs, choose kilometres, miles or nautical miles, and read the answer. It runs entirely on the device, with no location permission and no connection. WHAT YOU CAN DO - Enter any two latitude and longitude pairs and get the initial forward azimuth from the first toward the second, in degrees. - Read that bearing as a 16 point cardinal direction, from N through NNE to NNW, so it lands on a compass rose without arithmetic. - Get the distance in kilometres, statute miles or nautical miles, switched with one tap. - Get the midpoint coordinates of the route, computed on the sphere rather than averaged. - Work with no signal, no account and no sign up. HOW IT IS CALCULATED Distance uses the haversine formula on a sphere of radius 6371.0088 km, the IUGG mean Earth radius. Bearing is the forward azimuth from spherical trigonometry, normalised to 0 through 360 degrees. The midpoint is built from Cartesian components and converted back, not averaged, which matters as soon as the two points are far apart or close to a pole. WHO IT IS FOR Sailors plotting a leg, pilots checking a heading, hikers and search teams working off a map, radio operators pointing an antenna, and anyone holding two coordinate pairs who needs the line between them. PRIVACY BearingCalc has no accounts, no analytics and no advertising identifiers. It never asks for your location. The coordinates you type stay on the device. Two points, one line, and the numbers you need to follow it.