Nether Portal Calculator

Quick Answer: To convert Minecraft coordinates between the Overworld and the Nether, divide your Overworld X and Z by 8 and round down (Y stays the same). To go the other way, multiply your Nether X and Z by 8. The calculator above does this automatically, the same way Minecraft itself does.

How to Use the Nether Portal Calculator

• Build the Portal Frame: In the Overworld, build the Nether portal frame at your desired spot, but don’t light it up just yet.
• Find Your Coordinates: Step into the portal frame and press F3 to see the coordinates (X, Y, Z). Don’t forget to note which direction you’re facing when entering the portal!
• Enter Coordinates in the Calculator: Take the X, Y, Z coordinates from Step 2 and input them into the “Overworld coords” section of the Nether Portal Calculator.
• See the Nether Coordinates: Once you input your Overworld coordinates, the Nether coordinates will automatically appear in the “Nether coords” section.
• Finish Building the Portal: Light the portal in the Overworld and step through to the Nether. Then, go to the Nether coordinates the calculator gave you.
• Build Your Nether Portal: Replace the block you’re standing on with obsidian, face the same direction as in the F3 screen, and add obsidian blocks to finish the base of the portal. Light the portal in the Nether.
• Remove the Old Portal: After using your new portal, go back to the first Nether portal and destroy it or disable it.
• Return to the Overworld: Head back to the Overworld through your newly created Nether portal.

Important Notes:

• Portal Linking: When the game looks for an existing portal to connect to, it searches within a 128-block radius in the Overworld and a 16-block radius in the Nether (Java Edition), or 128 blocks in both directions (Bedrock Edition). Build well outside those ranges from a portal you want to keep separate, or well within them to link to one on purpose.
• 3D Distance Calculation: The 3D distance is calculated using the Pythagorean theorem. The distance will update in real-time as you enter new coordinates into the calculator.
• Height Matters: Be mindful of height (Y) when building portals near the build limit in the Overworld. In the Nether, your portal might end up near the ceiling.
• Precise Linkage: When copying coordinates from the F3 screen, make sure to round down the numbers and ignore any decimals.
• Extra Tool: Use the 3D Distance Calculator to accurately measure the distance between Nether portals in both the Overworld and the Nether.

How to Use the 3D Distance Calculator

• Enter Coordinates for Location 1: In the "Location 1" section, input the X, Y, Z coordinates for the first place you want to measure.
• Enter Coordinates for Location 2: Now, do the same in the "Location 2" section for the second location.
• Check the Distance: The distance between the two spots will be automatically calculated and shown under the "Distance" section. It updates as you enter the coordinates.
• Reset the Calculator: Want to start over? Just click the "Reset" button to clear everything and set the values back to zero.

Additional Notes:

• Instant Calculation: The calculator updates the distance as soon as you input new coordinates for both locations.
• 3D Distance Formula: The 3D distance is calculated using the Pythagorean theorem considering the X, Y, Z values as 3D space coordinates.
• Fully Responsive: The calculator is designed to work seamlessly across all screen sizes—desktop, tablet, and mobile.

Nether Portal Size: Minimum and Maximum

• Minimum size: 4 blocks wide by 5 blocks tall.
• Maximum size: 23 blocks wide by 23 blocks tall.
• Corners: The four corner blocks of the frame aren't required, but a portal the game lights for you always includes them, using 4 extra obsidian blocks.
• Shape: Any rectangular frame between those two sizes works, in Java Edition and Bedrock Edition alike.

Frequently Asked Questions

How do you calculate Nether portal coordinates?
Divide the Overworld X and Z coordinates by 8 and round down; the Y coordinate doesn't change. To convert the other direction, multiply the Nether X and Z coordinates by 8. This calculator applies that same rule automatically.

Is the Nether portal calculator different for Java and Bedrock?
The coordinate math itself (divide or multiply by 8) is identical on both editions. The difference is how far the game searches for an existing portal to link to: Java Edition searches a 128-block radius in the Overworld but only a 16-block radius in the Nether, while Bedrock Edition searches 128 blocks in both directions. Entering your own F3 coordinates into this calculator sidesteps that search distinction and gives you an exact match either way.

What's the minimum and maximum size for a Nether portal?
A working portal frame can be as small as 4 blocks wide by 5 blocks tall, or as large as 23 by 23 blocks, in either edition.

Why didn't my new portal link up where I expected?
The most common cause is an old, still-active portal sitting closer to the converted coordinates than the new one you built. If an active portal already exists within the search radius above, Minecraft links to that one instead of creating a new one at your calculated spot. Deactivate or destroy the old portal first if you want the new coordinates to take effect.