🌀 Minecraft Nether Portal Calculator

How the Nether Portal Ratio Works

In Minecraft, 1 block in the Nether equals 8 blocks in the Overworld along the X and Z axes. The Y (height) coordinate is not scaled. So to find where an Overworld portal will connect:

• Overworld → Nether: divide X and Z by 8 (netherX = overworldX ÷ 8).
• Nether → Overworld: multiply X and Z by 8 (overworldX = netherX × 8).

This 8:1 ratio is exactly why players build Nether highways: walking 100 blocks in the Nether moves you 800 blocks across the Overworld.

Building Perfectly Linked Portals

Minecraft doesn’t always link portals the way you expect. When you step through a portal, the game looks for an existing portal near the scaled coordinate; if it finds one within range it links to it, otherwise it generates a brand-new portal. To get a reliable 1:1 link:

• Note your first portal’s coordinates (press F3 in Java, or enable Show Coordinates in Bedrock).
• Use this calculator to get the exact matching coordinate in the other dimension.
• Travel there and build the second portal manually at those coordinates instead of letting the game auto-generate one.
• Light it, and the two portals will link directly to each other.

Avoiding Portal Cross-Linking

Because of the 8:1 ratio, portals that are close together in the Nether can steal each other’s links. Keep separate portal pairs at least 128 blocks apart in the Nether — that’s 1024 blocks apart in the Overworld — so each Overworld portal connects to its own Nether portal.

About This Tool

This calculator uses Minecraft’s exact coordinate ratio, so results are accurate for both Java and Bedrock Edition. Everything runs in your browser. For finding Nether fortresses, bastions, and Overworld structures to connect with your highway, use the full MC Seed View map.