Distance Calculation using Latitude and Longitude

In selecting frequencies for a radio, you often run into large transmitters which are licensed. Before selecting frequencies, you need to get the location of these transmitters (often in longitude and latitude) and compute the effective strength of them at your location (also in longitude and latitude).

Below you will find a calculator that can give you distance between two points on the earth defined by latitude and longitude. This will help you make frequency decisions for your site.