Convert Minecraft coordinates between the Overworld and the Nether with the 8:1 portal ratio — plan fast travel and link portals accurately.
1 block in the Nether ≈ 8 blocks here
0 0 0
X and Z compress by 8 — Y stays the same
0 0 0
Enter coords on either side — the other updates live. Copy outputs X Y Z for chat or portal planning. Ideal linking range is within about 128 Overworld blocks (16 Nether blocks) of the target.