What this tool does
This calculator converts coordinates between Minecraft's Overworld and Nether dimensions so you can build perfectly linked portal pairs. Enter your coordinates from either dimension and instantly see exactly where to place your second portal for a guaranteed connection.
Minecraft uses an 8:1 coordinate ratio between the Overworld and the Nether. Every single block you travel in the Nether equals 8 blocks in the Overworld, making Nether travel the fastest way to cover long distances. This tool handles the math so you can focus on building.
How it calculates
**Overworld to Nether:** \`\`\` Nether X = floor(Overworld X / 8) Nether Z = floor(Overworld Z / 8) Y = unchanged \`\`\`
**Nether to Overworld:** \`\`\` Overworld X = Nether X * 8 Overworld Z = Nether Z * 8 Y = unchanged \`\`\`
**Where:** - **X** and **Z** are horizontal coordinates (east-west and north-south) - **Y** is the vertical coordinate (height) and does not change between dimensions - **floor()** rounds down to the nearest integer, which matches how Minecraft internally calculates portal positions
**Example:** An Overworld base at X: 800, Z: -1600 maps to Nether coordinates X: 100, Z: -200. Walking 200 blocks in the Nether to reach that point is equivalent to walking 1,600 blocks in the Overworld.
Who should use this
- **Survival players**: Build Nether highways to connect distant bases, villages, or biomes in a fraction of the travel time - **Server administrators**: Plan portal networks for multiplayer servers where players need fast travel between key locations - **Speedrunners**: Calculate optimal portal placement for Nether travel routes during speedrun attempts - **Redstone engineers**: Design precise portal-based transportation systems that require exact coordinate alignment - **New players**: Understand the Nether coordinate system before building your first portal pair
How to use
1. Select your source dimension using the toggle (Overworld to Nether or Nether to Overworld) 2. Enter your X, Y, and Z coordinates from the source dimension (press F3 in-game to view your coordinates) 3. Read the target coordinates from the hero result card - these are where you should build your second portal 4. Compare both dimension coordinates in the side-by-side cards to verify your portal placement 5. Check the distance savings to see how much travel the Nether shortcut saves you
Portal linking tips
**Build at exact coordinates.** The closer your portal is to the calculated position, the more reliable the link. Portals that are off by even a few blocks can link to the wrong destination.
**Watch the Y level in the Nether.** While Y does not affect portal linking math, building at Y=15 keeps you above lava lakes (which fill the Nether below Y=10) and reduces the chance of spawning inside netherrack.
**Avoid portal interference.** If two Overworld portals map to Nether coordinates within 128 blocks of each other, they may link to the same Nether portal. Space your Overworld portals at least 1,024 blocks apart for clean links.
**Light the portal in the right order.** Always build and light the Nether-side portal manually at the calculated coordinates. If you just walk through an Overworld portal, the game auto-generates a Nether portal at the nearest valid location, which may not be where you want it.
FAQs
**Q: Why does Y not change between dimensions?** A: Minecraft only applies the 8:1 ratio to the X and Z axes (horizontal movement). The Y axis (height) is independent in each dimension. However, the Nether has a bedrock ceiling at Y=127, so high Overworld Y values cannot be replicated exactly in the Nether.
**Q: What happens if I build my portal a few blocks off from the calculated coordinates?** A: The game searches for the nearest portal within a 128-block radius in the target dimension. If your portal is close enough, it will still link correctly. But if another portal is closer to the calculated position, the link may go there instead.
**Q: Does this work in Minecraft Bedrock Edition?** A: Yes. Both Java Edition and Bedrock Edition use the same 8:1 coordinate ratio for Overworld-to-Nether conversion. The portal search radius and linking mechanics are identical.
**Q: Can I link portals in the End dimension?** A: No. The End dimension does not use the coordinate ratio system. You can only build portals in the Overworld and the Nether. End portals use a completely different mechanic.
**Q: Why do I sometimes end up at the wrong portal?** A: Portal interference. When multiple portals exist within the search radius, the game picks the nearest one to the calculated target coordinates. Use this calculator to verify that each portal pair has unique, non-overlapping target zones.
**Q: Is my data stored anywhere?** A: No. All calculations happen locally in your browser. Nothing is sent to any server.
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