This is helpful for people building Nether hubs in Minecraft, because the Nether is smaller then the Overworld so the coordinates are different. For example, if you wanted to make a nether portal take you to a certain coordinate in the Overworld, you would plug in the coordinates of that place into this calculator, and it will tell you exactly where you need to build a portal in Nether so you will end up at that desired spot in the Overworld. Hope that made sense! Please tell me if it didn't.
All me, except for Google Images. Also, if it's something like 154.253, ignore everything after the point, (which is the ".") and just round it up to 154. ALSO, check out my cool new space platformer called Into Space that I made: http://scratch.mit.edu/projects/27384372/