A chunk is the 16 by 16 block segment that Minecraft uses to build and load the world, and being able to see where chunks start and end is a huge help. It lets you line up farms perfectly, hunt down slime chunks, and understand why an area is lagging. On Java Edition it takes one keyboard shortcut. On Bedrock there is no shortcut, so you use coordinates instead.
This guide covers how to show chunk borders on Java, how to find them on Bedrock, how to read your chunk from the debug screen, and why chunks matter. Everything here is accurate for the latest 2026 version of Minecraft.
Quick answer: on Java Edition, press F3 + G to toggle chunk borders on and off. On Bedrock Edition there is no shortcut, so turn on Show Coordinates and remember that a chunk border falls wherever your X or Z value is a multiple of 16.
Seeing Chunks at a Glance
| Edition | How to see chunks |
|---|---|
| Java | Press F3 + G to toggle chunk borders |
| Bedrock | Use coordinates (borders at multiples of 16) |
| Chunk size | 16 x 16 blocks, 384 tall in the Overworld |
| Main uses | Farms, slime chunks, fixing lag |
How to Show Chunk Borders on Java (F3 + G)
This is the easy one:
- Press F3 + G at the same time.
- Colored grid lines appear over the world. The red vertical lines mark the chunk borders, and the blue lines mark the smaller 16-block-tall sub-chunk sections inside them.
- Press F3 + G again to turn the lines off.
If nothing happens, your keyboard is likely the problem. Many laptops use the F-keys for volume and brightness, so try Fn + F3 + G, or Alt + F3 + G on some setups. Getting the F-keys to behave (or turning off the “media keys” default in your keyboard settings) fixes it.
Find Your Chunk With the Debug Screen (F3)
Press F3 on its own to open the debug screen. On the left, look for the Chunk: line. It tells you exactly which chunk you are standing in and your position inside that chunk, right below your XYZ coordinates. This is handy for noting a chunk’s location so you can find it again later.
How to See Chunks on Bedrock Edition
Bedrock has no F3 + G, so you find chunk borders with math:
- In your world settings, turn on Show Coordinates.
- Watch your X and Z values as you walk. A new chunk begins every time X or Z hits a multiple of 16 (such as 0, 16, 32, -16, and so on).
- To stand exactly on a border, walk until your X or Z reads a multiple of 16. The corner where both are multiples of 16 is a chunk corner.
It is not as visual as Java, but once you know the trick you can map out any chunk boundary you need.
Why Chunks Matter
Knowing your chunks unlocks some of the most useful things in the game:
- Aligning farms. Many farms and redstone builds only work correctly when they sit inside a single chunk or straddle a specific border. Seeing the grid makes lining them up easy. Our guide to the best Minecraft farms shows builds where this matters.
- Finding slime chunks. About 1 in 10 chunks is a slime chunk, where slimes spawn below Y 40 no matter the light level. Marking chunk borders lets you test which ones spawn slimes. (In Java, these are decided by your world seed; in Bedrock, the same coordinates are slime chunks in every world.)
- Fixing lag. The more chunks loaded and rendered, the lower your frame rate. Understanding chunks helps you diagnose performance drops, and pairing that with more allocated RAM keeps things smooth.
Frequently Asked Questions
On Java Edition, press F3 + G to toggle chunk borders. On Bedrock Edition, turn on Show Coordinates and look for borders where X or Z is a multiple of 16.
It toggles the chunk border overlay in Java Edition, drawing lines that mark where each 16 by 16 chunk begins and ends.
Usually a keyboard issue. On laptops, the F-keys often need Fn, so try Fn + F3 + G, or Alt + F3 + G, or change your keyboard’s function-key setting.
A chunk is 16 blocks wide by 16 blocks long, and it spans the full world height, which is 384 blocks in the Overworld (from Y -64 to Y 320).
There is no shortcut. Enable Show Coordinates and remember that chunk borders sit at every multiple of 16 on the X and Z axes.
A chunk with a 1 in 10 chance of letting slimes spawn below Y 40 regardless of light level. Seeing chunk borders helps you find and test them.
Once you can see your chunks, aligning farms and finding slime chunks stops being guesswork. On Java, it is just F3 + G, and on Bedrock, a quick coordinate check does the job. From there, put that grid to work on a proper farm build.
