Select the conversion direction and enter the values to start the conversion. Separate the values by comma's to convert more values at the same time.
Every geocache comes with a GC-code, that is known by anyone. A little less known is the fact that every geocache also has an ID-code. The GC-code and the ID-code are connected through a base conversion and in some case with a small offset.
The GC-code of a geocache is right on the geocache page, the ID-code can be found through the log page of the geocache. Click on the geocache page on: Log your visit. In the address bar of the browser you can find the ID-code of the geocache.