This website defaults to using your device's location to set the source. You can enter your own custom source location by using the search bar on the map or clicking somewhere on the map.
Enter your destination in the field below, or drop a txt file with your coords using this format: 43.65748683,-79.37976122
This page also uses a web worker to calculate the distance between the source point and destination point using the haversine formula. The page will also convert the coordinate values into a human readable format using reverse geocoding. Click the calculate distance button to obtain the distance between the two points.