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RAM Calculator

Minecraft Server RAM Calculator

Find out in seconds how much memory your Minecraft server actually needs — plus a clear explanation of why we recommend that exact number.

Calculate your RAM

How many players should be able to play on your server at the same time?

Vanilla servers don't support plugins or mods at all — this field only applies to Paper, Spigot, Fabric, Forge and modpacks.

Your version doesn't change how much RAM you need, but it does decide which Java version your server requires.

Minecraft 1.21.11 needs Java 21 — we set this up automatically on any server you order with us.

Our recommendation

Recommended memory
GB

Comfortable for 10–18 players.

from €4.87 per month

Just an estimate — you'll see the final price at checkout.

This setup exceeds our largest tier of 32 GB — consider splitting your server across multiple instances, or contact our support team for a custom solution.

How we got this number

  • 4 GB base for 10 players
  • +0 GB for 0 plugins/mods
  • = 4 GB recommended

Why exactly this number?

Our recommendation uses the exact same formula our order wizard uses to estimate player counts, so this calculator and the order wizard show the same value. Your server gets the full amount of RAM you purchase as Java heap, which Java uses for the actual world data, entities and chunks. On top of that, we automatically reserve extra container memory so the Java VM doesn't crash from its own internal memory needs.

Java heap

4 GB

The full amount of RAM you purchase is available to Java as heap — for world data, entities, chunks and plugins/mods.

Container RAM

4.8 GB

We automatically reserve an extra 20 % of container memory so the JVM's non-heap needs (metaspace, thread stacks, garbage collection) never cause a crash.

+20 % infrastructure buffer

Your server gets the full amount of RAM you buy as Java heap. On top of that, we automatically reserve an extra 20 % of container memory so the Java VM doesn't crash. You don't need to plan or add anything for this yourself — it's already included in your plan.

RAM sorted — ready for your own server?

Order your Minecraft server at game-serverhosting with our recommended RAM already filled in — including the automatic infrastructure buffer, automatic Java setup and full panel access.

Rent a Minecraft server

How much RAM does a Minecraft server really need?

Memory is the single biggest lever for your Minecraft server's performance — too little RAM means lag, slow chunk loading and, in the worst case, crashes in the middle of a session. How much you actually need depends on three factors: how many players are online at once, which server software you run (Vanilla, Paper, Spigot, Fabric, Forge or a full modpack), and how many plugins or mods you have installed. Our calculator uses the exact same formula as our order wizard, so the recommendation here matches what you'll see when you actually order.

How to use the RAM calculator

Start by entering how many players should be able to play at the same time, then pick your server software. If you're running Paper, Spigot, Fabric, Forge or a modpack, also enter roughly how many plugins or mods you plan to install — this field is disabled for Vanilla, since Vanilla doesn't support plugins or mods at all. The calculator immediately shows you the recommended GB figure, a breakdown of how we got there, and a button that takes you straight to checkout with that RAM value already filled in.

What happens if you run out of RAM? (Out of Memory)

When a Minecraft server needs more memory than it has available, the Java VM can crash with an Out-of-Memory (OOM) error — sometimes at the worst possible moment, with lots of players online or a big redstone contraption running. A crash like that is more than just annoying: if the world couldn't save cleanly at that moment, you risk losing chunk data or player progress. That's exactly why game-serverhosting automatically reserves extra container memory above your Java heap (see "Why exactly this number?" above) — it significantly reduces the OOM risk, but it doesn't replace getting the sizing right in the first place. If you already run a server and keep seeing crashes, our Crash Report Analyzer can help you pin down the exact cause.

Why do Paper and Spigot need less RAM than Forge or modpacks?

Paper and Spigot are heavily optimized, Bukkit-based server software that handle many of Minecraft's standard processes far more efficiently than vanilla — that saves a noticeable amount of memory, especially with more players online. Fabric and Forge, on the other hand, load additional mod code that brings its own data structures, extra entities and often entirely new gameplay mechanics — every mod you add increases the memory footprint a bit further. A full modpack often bundles anywhere from 50 to 300 mods at once, which is why modpack servers typically need noticeably more RAM than a comparable Paper server running a handful of plugins. That's why our recommendation factors in not just player count, but also your software choice and how many plugins or mods you're running.

Frequently asked questions about RAM

For 10 players on a Vanilla, Paper or Spigot server, we recommend 4 GB. If you're running a modpack or Forge with lots of mods instead, the same 10 players push that up to around 10 GB — mods need noticeably more memory than plain plugins, since they load extra game logic and data.
It really depends on your player count and how many mods are in the pack. For a moderate modpack, 4 GB typically covers 2 to 4 players — for bigger groups or especially mod-heavy packs (200+ mods) you should plan for more memory. The best way to get an exact figure is to run the calculator above with your actual mod count.
The Java heap is the memory the Minecraft server software itself uses for world data, entities and game logic — with us, it's exactly equal to the RAM you order. Container RAM is a bit larger: we automatically reserve an extra 20 % of memory at the infrastructure level, so internal Java processes like garbage collection and thread management never cause a crash. That distinction is exactly why our servers run more stably than a plain 1:1 allocation with no buffer.
No. The extra 20 % of container memory is reserved automatically and for free, on top of the RAM you order — you don't need to add anything or plan for it yourself. The GB figure our calculator recommends is already the number you should order.
Yes, memory needs grow as you add more plugins or mods, since every plugin or mod loads its own code and data into the heap. As a rule of thumb, we budget an extra GB per 10 plugins, or per 20 mods — mods tend to be more memory-hungry than plain plugins, since they usually reach deeper into the game.
Barely, in any way we'd trust enough to put a GB number on — so version doesn't factor into our GB recommendation at all. What the version does determine is which Java version your server needs: newer Minecraft versions require newer Java versions, and we set up the right Java version automatically on any server you order with us.