How to Make a Nether Portal in Minecraft

What Is a Nether Portal?

A Nether portal is a rectangular obsidian frame that creates a gateway between the Overworld and the Nether dimension. Stepping through the purple swirl teleports you to the corresponding location in the other dimension. The Nether is essential for accessing blaze rods, nether wart, ancient debris, glowstone, quartz and other exclusive resources.

Materials You Need

At minimum, you need:

• 10 obsidian blocks, This is the minimum for a portal frame if you skip the corners. A full frame with corners uses 14 obsidian.
• Flint and steel, Crafted from 1 iron ingot and 1 flint (dropped by gravel). Used to light the portal.

Obsidian is created when water flows onto a lava source block. You need a diamond pickaxe to mine it, and each block takes about 9.4 seconds to break without Efficiency.

Building a Portal Without a Diamond Pickaxe

If you do not have a diamond pickaxe yet, you can cast a portal in place using a bucket and lava:

• Find a lava pool on the surface or underground.
• Bring at least one water bucket and one lava bucket (or access to both fluids nearby).
• Build a mold from dirt or cobblestone in the shape of the portal frame.
• Pour lava into each slot of the mold, then pour water over it to convert each lava source into obsidian.
• Repeat for all 10-14 blocks. Remove the dirt mold when finished.

This technique takes longer but saves you from needing diamonds just to reach the Nether. Speed runners use this method to enter the Nether within the first few minutes of a world.

Portal Dimensions and Shape

The portal frame must be a rectangle of obsidian with specific size constraints:

• Minimum size: 4 wide by 5 tall (including the frame). The interior is 2x3.
• Maximum size: 23 wide by 23 tall. Larger portals work and look impressive but use enormous amounts of obsidian.
• Corner blocks are optional. Skipping them saves 4 obsidian per portal.
• The portal must be vertical. You cannot build horizontal portals.

For a standard minimum portal without corners, place 3 obsidian across the bottom, stack 3 obsidian on each side, and place 3 across the top. Then use flint and steel on any air block inside the frame to activate it.

Lighting the Portal

The most common way to light a portal is with flint and steel. Click on the inside of the obsidian frame, and the purple particles fill the opening. However, there are alternatives:

• Fire charge, Functions like a single-use lighter. Crafted from blaze powder, coal and gunpowder.
• Lava and wood, Place a flammable block (wood planks, carpet) inside the portal frame. Then place lava next to it so the block catches fire. The fire activates the portal. This is useful if you have no iron for flint and steel.
• Burning dispenser, A dispenser loaded with a fire charge and activated by redstone can light the portal automatically.

Ghast fireballs can also relight a portal in the Nether if a ghast breaks it. Position yourself so the fireball hits the inside of the frame.

How Portal Linking Works

Understanding portal linking prevents frustrating situations where your portals connect to the wrong locations. The core rule is simple: 1 block in the Nether equals 8 blocks in the Overworld on the X and Z axes. Y coordinates are not scaled.

When you step through a portal, the game does the following:

• Takes your current coordinates and divides (or multiplies) X and Z by 8.
• Searches for an existing portal within 128 blocks (Overworld) or 16 blocks (Nether) of the calculated position.
• If an existing portal is found, it links to that one. If not, it creates a new portal at the closest valid location.

Building Linked Portal Pairs

To ensure two portals link correctly (for example, connecting your base to a specific Nether location):

• Note your Overworld portal coordinates (X, Y, Z). Press F3 on Java or enable coordinates on Bedrock.
• Divide X and Z by 8. This gives you the target Nether coordinates.
• Enter the Nether, travel to those coordinates, and build your Nether-side portal there.
• Light the Nether portal and step through. You should arrive at your Overworld portal.

Example: If your Overworld base is at X=800, Z=400, build your Nether portal at X=100, Z=50 in the Nether.

Using Portals for Fast Travel

Because the Nether compresses distances by 8x, portals are the fastest overland travel method before you get elytra. To create a Nether highway:

• Build portals at key locations in the Overworld (base, farms, villages, monuments).
• Build corresponding portals in the Nether at the correct divided coordinates.
• Connect the Nether portals with tunnels through the netherrack at Y = 120 (above the lava ocean, below the bedrock ceiling).
• Use ice roads and boats in the tunnels for even faster travel, boats on blue ice reach over 70 blocks per second.

Common Portal Problems

• Portal links to the wrong place, Your coordinates are off. Break the mislinked Nether portal and rebuild it at the correct divided coordinates.
• Two portals link to one Nether portal, The Nether portals are too close together. Space them at least 16 Nether blocks apart (128 Overworld blocks).
• Portal spawns on a cliff or over lava, The game placed it at the nearest valid surface. Build a platform around it for safety and consider rebuilding at the correct coordinates manually.
• Ghasts keep breaking your portal, Enclose the Nether portal in cobblestone or stone. Ghast fireballs cannot destroy blast-resistant blocks.

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