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Minecraft Nether Portal Calculator - Coordinate Converter

Free online calculator to convert Overworld coordinates to Nether coordinates. Plan nether portals, calculate obsidian requirements, and travel distances.

快速回答：tools/nether-portal.quick_answer_v2

Coordinate Converter

I am in the

Build the Nether portal at

X 100 · Y 70 · Z -40

1 block in the Nether = 8 blocks in the Overworld · The Y coordinate is not scaled between dimensions, but affects portal linking distance.

Portal link checker

tools/nether-portal.checker_intro

Base
Base

Use the purple portal block at the lowest corner (smallest X or Z, bottom row).

  • Base → Nether

    Links to Base, and it links back. Good pair.

  • Base → Overworld

    Links to Base, and it links back. Good pair.

Portal Materials

Obsidian needed
14
Interior size
2 × 3

Minimum portal: 4×5 (10 obsidian without corners) · Maximum portal: 23×23

Distance Calculator

Two Overworld points: how long the trip takes through the Nether.

Overworld distance
4,717 blocks
Nether distance
590 blocks
  • Walking137 s in the Nether / 1093 s walking the Overworld
  • Sprinting105 s in the Nether / 841 s walking the Overworld
  • tools/nether-portal.boat_blue_ice8 s in the Nether / 65 s walking the Overworld

Portal Linking Rules

tools/nether-portal.linking_description_v2

  • Build your Nether-side portal at the exact calculated coordinates for reliable two-way linking.
  • tools/nether-portal.tip_2_v2
  • The Y coordinate matters for linking distance — try to match Y levels when possible.
  • Use F3 in-game to view your exact coordinates before entering them here.

常见问题

Divide your Overworld X and Z coordinates by 8 to get the corresponding Nether coordinates. The Y coordinate stays the same. For example, Overworld (800, 64, 400) becomes Nether (100, 64, 50). To convert from Nether to Overworld, multiply X and Z by 8.
The Y coordinate is not scaled in the conversion, but it IS used when the game calculates which portal to link to. The game uses 3D Euclidean distance including Y, so portals at very different heights can cause linking to the wrong portal.
The minimum nether portal (4 wide × 5 tall) requires 10 obsidian blocks without corners or 14 with corners. The maximum portal size of 23×23 requires up to 88 obsidian blocks with corners.
tools/nether-portal.faq_a4_v2
tools/nether-portal.faq_a5_v2
tools/nether-portal.faq_a6_v2
A nether hub is a central structure in the Nether connecting multiple portals for fast travel. Since 1 Nether block = 8 Overworld blocks, travelling through a nether hub reduces travel distance by 87.5%, making it the most efficient way to move between distant bases.
tools/nether-portal.faq_a8_v2

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