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How much RAM does a Minecraft server need?

The right amount of RAM depends on your Minecraft edition, version, player count, and whether you run vanilla, plugins, or mods. As a rough guide, a small vanilla server runs comfortably on 3 to 4 GB, a plugin-heavy survival server on 6 to 8 GB, and a large modpack or network on 12 GB or more. The calculator above turns your exact setup into a precise recommendation in seconds.

Newer versions (26.x and Java 25) need more

Memory use has climbed across both vanilla and modded frameworks since the 1.21 era. Minecraft now runs on the Java 25 runtime, which has a heavier baseline footprint, and richer chunk and registry data means generating the world takes more heap. Modern vanilla wants 3 to 4 GB minimum, light modpacks start around 6 to 8 GB, and heavy kitchen-sink packs commonly begin at 12 GB or more. Pick the 26.x or newer version in the calculator to plan for these heavier baselines.

Built for every kind of server

Whether you are launching a Lifesteal SMP, a ranked Bedwars arena, a viral event server, a modded Forge or Fabric world, or a multi-server network behind a proxy, the calculator accounts for plugins, mods, modpacks, and player load so you never under or over provision. The same SMPs, networks, and creators you already know run on Prism.

Frequently asked

How much RAM does a Minecraft server need?

A small vanilla server runs well on 3 to 4 GB, a plugin-heavy survival or SMP server on 6 to 8 GB, and large modpacks or multi-server networks on 12 GB or more. The exact number depends on version, players, and plugins or mods, which the calculator above factors in.

How much RAM does Minecraft 26.x (Java 25) need?

Modern versions on the Java 25 runtime carry a heavier baseline, so plan for 3 to 4 GB minimum for small vanilla, 6 GB or more once you add plugins and players, and 12 GB or more for heavy modpacks. Select the 26.x or newer version in the calculator for these baselines.

How much RAM for a modded server or modpack?

Light packs up to ~50 mods want at least 6 to 8 GB, and heavy kitchen-sink packs commonly start at 10 to 12 GB or more to hold a steady 20 TPS during exploration. Pick your modpack in the calculator for a tailored figure.

How much RAM per player?

There is no fixed per-player number; RAM scales with world size, plugins, and mods more than raw player count. As a rough guide, budget roughly 1 GB per 8 to 10 active vanilla players and more for modded or plugin-heavy servers.

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