It is my first extension.
As you have read in title DistanceCalc calculates distance between two places from coordinates (latitudes and longitudes).
Latest Version: 1
Released: Sep 12, 2019
Just one block
It has just one function/block as you can see in above screenshot.
It accepts four coordinates in format like lat1,lng1,lat2, and lng2 and all of them should be integers(double).It returns distance in KiloMetres.
But you can convert distance(Km) in different units by using some math blocks.
An example can be this:
Hope it helps!