Minecraft Nether Portal Calculator

Give it a position in the Overworld and it tells you where that is in the Nether. Give it a position in the Nether and it tells you where that is in the Overworld. Optionally give it a Y, and it tells you what happens to your altitude — which is nothing, and why that still matters.

It answers a second question too. Enter two Overworld places and it measures the trip: how far apart they are on the surface, how far apart the matching Nether positions are, and how many blocks of horizontal travel the Nether route removes.

You can keep a short list of destinations in this browser — "base", "village", "stronghold" — so the coordinates you look up most are one press away rather than something you retype. Nothing is sent anywhere and there is no account.

Horizontally, one Nether block is eight Overworld blocks. Going down to the Nether the X and Z coordinates are divided by eight; coming back up they are multiplied by eight. That is the whole conversion, and it is the same in Java Edition and in Bedrock Edition.

The exact answer is shown before the rounded one. Dividing an ordinary Overworld coordinate rarely lands on a whole block: X 125 is Nether X 15.625, not 15 and not 16. This page prints 15.625, because that is the answer, and prints the whole block beside it as a separate thing.

The whole block is a floor, and that is the game's convention rather than ToolGuild's. Minecraft converts an Overworld position to (floor(X ÷ 8), Y, floor(Z ÷ 8)), rounding toward smaller positive values and larger negative values. So X 125 floors to 15 and X −125 floors to −16, not to −15. ToolGuild shows the floor because the game uses the floor, not because rounding down felt tidier.

Coming back up is exact. Multiplying a whole Nether coordinate by eight always gives a whole Overworld coordinate, so there is nothing to round. What is not reversible is the trip *down*: once 125 has become the block 15, going back up gives 120. The page shows you the exact figure precisely so you can see where that eight-block window sits.

Y is carried across, not converted. Altitude takes no part in the scaling.

The range this page accepts is ToolGuild’s own. Coordinates from −30,000,000 to 30,000,000 on each horizontal axis — a round number chosen to cover any world anybody plays in and to keep the arithmetic exact. It is not a statement about where a Minecraft world ends: the boundary rules differ between Java Edition and Bedrock Edition, and this page makes no claim about either.

Converting coordinates and linking portals are two different questions, and this page answers only the first.

The arithmetic above tells you which Nether position corresponds to a place in the Overworld. It does not tell you that a portal built there will connect to the one you came from. When you step through, the game converts your coordinates and then *searches* around the result for a portal to use, reusing an existing one if it finds it and building a new one if it does not. How far that search reaches differs between Java Edition and Bedrock Edition, and what it finds depends on every portal already standing nearby — including ones you forgot about, and ones the world generated without you.

So a portal a hundred blocks from another one, in the Overworld, may well arrive at the same Nether portal as its neighbour. That is not the calculator being wrong. It is the difference between "these coordinates correspond" and "these portals link", and any page that collapses the two is selling you a certainty it does not have.

What the corresponding coordinates are actually good for is everything upstream of that: choosing roughly where to dig, working out whether two bases are close enough in the Nether to share a tunnel, knowing before you set off how far the trip really is, and understanding why the portal you built at the "right" coordinates went somewhere else. Those are the questions the conversion genuinely answers, and this page stops there.

Nothing here rests on a Mojang statement, because ToolGuild did not find one. The official Minecraft site's own article about the Nether names no ratio; the Bedrock creator documentation does not state the vanilla dimension's scale; the help centre has no article on it. That is what a search found, not a proof that nothing exists anywhere — but it is what ToolGuild can honestly say. So these facts rest on the Minecraft Wiki, and the page says so in the provenance line rather than borrowing an authority it does not have. It is also the rare mechanic you can check yourself in about ninety seconds: note your coordinates, walk through a portal, and read the screen.

Your base is at X 800, Z −160 in the Overworld. Dividing both by eight gives Nether X 100, Z −20 — both exact, both whole blocks, because 800 and −160 happen to divide evenly.

Now take a place that does not. X 125, Z 63 gives Nether X 15.625 and Z 7.875. The whole blocks the game itself would land on are 15 and 7. The page shows both, and shows them as different things: 15.625 is where those coordinates *correspond*, and 15 is the block the conversion floors to.

Go the other way and it is simpler. A Nether portal at X 100, Z −20 corresponds to Overworld X 800, Z −160 — exact, whole, and reversible.

Now the route. Your base is at X 0, Z 0 and a village you visit is at X 300, Z 400. On the surface those are 500 blocks apart in a straight line. Their matching Nether positions are 62.5 blocks apart. Walking it through the Nether is 437 or so blocks of travel you do not do — the same journey, an eighth of the walking.

Finally, altitude. You enter Y 200 for a mountain base and convert to the Nether. The page carries 200 across unchanged, and then tells you something more useful than the number: the Nether's bedrock roof is at Y 127, so there is no ordinary Nether at your altitude at all. Your matching position is under that roof, wherever you decide to put it.

It does not promise that two portals will link. It converts coordinates. Arriving at a particular portal depends on a search around the converted position, on portals that already exist near it, and on where the game can fit a new frame — none of which this page models.

It does not know your world. It has never seen your terrain, your existing portals, the lava, the ravine or the bastion in the way. A corresponding coordinate is a target, not a survey.

It does not measure a path. The route figures are straight-line horizontal distances between coordinates. Nothing walks in a straight line through the Nether, and the number does not account for obstacles, elevation, tunnelling, mobs or the time any of it takes.

It says nothing about journey time. How long a trip takes depends on how you travel, and ToolGuild publishes no speed.

It covers Java Edition and Bedrock Edition only. The discontinued Legacy Console Edition scaled 1:3, 1:6 or 1:8 depending on world size, and is not offered here. A world with a modified dimension scale, a data pack or a mod that changes it is outside what this page can answer.

It says nothing about where your world ends. An earlier version of this page flagged coordinates against a "default world border". That figure is documented for Java Edition, the conversion constraint the same source describes is a different number again, and nothing ToolGuild read establishes Bedrock’s behaviour — so the flag was removed rather than guessed at. The −30,000,000 to 30,000,000 range this page accepts is ToolGuild’s own limit and nothing more.

These facts are community-derived, and the page says so. ToolGuild found no current first-party statement of the coordinate relationship in the official sources it checked, so the provenance line reads "Community-derived" and the verification level is 1. That is the honest label, not a disclaimer bolted on — and it is why the worked example above ends by telling you how to check it in your own game.

What is the Nether coordinate for my base? Divide the Overworld X and Z by eight. Leave Y alone. The calculator above does it and keeps the exact figure rather than rounding it away.

Why is my answer not a whole number? Because most coordinates do not divide by eight evenly. 125 ÷ 8 is 15.625, and that is the true corresponding position. The whole block beside it is what the game's own conversion floors to.

Should I round up or down? The game floors — down, and *further* down for negative coordinates, so −15.625 becomes −16. ToolGuild shows the floor for that reason and labels it as the game's convention.

Does Y change? No. The scaling is horizontal only. What can change is whether your altitude exists in the destination: the Nether's bedrock roof is at Y 127, so an Overworld base at Y 200 has no matching altitude in the ordinary Nether.

Is the ratio different in Bedrock Edition? No. Java Edition and Bedrock Edition both use eight horizontal Overworld blocks to one Nether block. ToolGuild records the factor per edition anyway, so that the day one of them changes it is a data correction rather than a rewrite.

If I build a portal at exactly these coordinates, will it link to my other one? Not necessarily, and this page will not tell you that it will. Coordinate conversion and portal linking are different questions — see the section above.

What coordinates does this page accept? −30,000,000 to 30,000,000 on X and Z. That is ToolGuild’s own range, not a statement about where a Minecraft world ends — the boundary rules differ between the editions and this page makes no claim about either.

How much shorter is the trip through the Nether? Horizontally, an eighth of the distance. The route planner works it out for two Overworld places and tells you the blocks of travel you save, as a straight-line figure rather than a promise about a path.

Are my saved destinations sent anywhere? No. They are kept in this browser, they have no account behind them, and "Start over" clears them. The labels are yours; ToolGuild never treats them as facts about the game.