Coordinate Conversion is the Conversion of the Minecraft "Overword" to the "Aether" cords. Generally, aether portals in the overworld leads to aether portals in the aether within 100 blocks, so the conversion should be 1 aether meter = 1 overworld meter, relative to the point 0,0.
Coordinate conversion for overworld and nether is 1:8, where 1 block travelled in the nether corresponds to 8 blocks travelled in the overworld (again, relative to point 0,0)
The dinfince of block found in the Aether compared to the "Overworld" is 17 Blocks.