Nether Portal Calculator | Minecraft Coordinates
Coordinate Converter
OVERWORLD
Enter X and Z to calculate your portal location. Y is optional, but useful for safer portal linking.
NETHER
Build the matching portal as close to these X and Z coordinates as possible. Keep the Y-level safe and similar when you can.
Travelling 1 block in the Nether equals 8 blocks in the Overworld.
Obsidian Calculator
Minimum working portal.
Portal Distance Checker
Check if two Overworld or two Nether portals are too close.
Enter X and Z for both portals to check distance.
Wrong Nether portal links can send you hundreds of blocks away from your base, so this calculator helps you place both portals in the right spot before you light them. Let's make sure you arrive exactly where you planned.
How This Nether Portal Calculator Helps
When I build portals in survival, I prefer to calculate the Nether side before lighting the first portal. It saves time and prevents the game from sending me to a random nearby portal. This Nether portal calculator converts Overworld coordinates to Nether coordinates, keeps your Y-level unchanged to prevent unsafe spawns, helps plan safe portal links, and is a brilliant tool for designing Nether hubs and Nether highways.
How to Use the Nether Portal Calculator
- Choose Overworld to Nether or Nether to Overworld.
- Enter your X, Y, and Z coordinates from Minecraft.
- Copy the calculated coordinates.
- Build the second portal as close to the result as possible.
How Nether Portal Coordinates Work
Dimension Ratio Mapping
In Minecraft, X and Z coordinates use an 8:1 ratio between the Overworld and the Nether. This means that traversing 1 block in the Nether is the equivalent of moving 8 blocks in the Overworld. Y does not scale.
Why Y Does Not Change
The Y coordinate represents your height in the world. It does not multiply or divide when travelling through a portal. We highly recommend checking your height manually, because an extremely high or low Y-level can affect safe placement and push the game's portal linking algorithm to select the wrong portal.
How to Avoid Wrong Portal Linking
To ensure a perfect link, build both portals manually. Use the calculated X and Z coordinates to place the frame. Keep your Y coordinate safe and reasonably close to the original portal when possible. Watch out for other nearby portals within the portal search radius, and check negative coordinates carefully to avoid off-by-one errors.
Obsidian Needed for a Nether Portal
The minimum working frame for a Nether portal is 4×5 blocks. The maximum frame size in both Minecraft Java Edition and Bedrock Edition is 23×23 blocks. Putting obsidian in the corners is entirely optional. A minimum practical portal without corners uses 10 obsidian blocks, while a full 4×5 portal frame with corners uses 14 obsidian.
| Portal Size (W × H) | Obsidian (No Corners) | Obsidian (With Corners) | Notes |
|---|---|---|---|
| 4 × 5 | 10 blocks | 14 blocks | Absolute minimum to work |
| 5 × 5 | 12 blocks | 16 blocks | Standard square opening |
| 10 × 10 | 32 blocks | 36 blocks | Great for Nether hub centres |
| 23 × 23 | 84 blocks | 88 blocks | Minecraft maximum limit |