How much RAM does a Terraria server need?

Q: How much RAM does a Terraria server need?

About 2 GB for 4 players without mods, and never less than 1 GB. Vanilla Terraria runs in about 1-2 GB. tModLoader with a big mod list (Calamity, Thorium) needs several times that. This is an estimate based on typical usage.

Terraria server RAM calculator

Vanilla Terraria runs in about 1-2 GB. tModLoader with a big mod list (Calamity, Thorium) needs several times that.

Recommended RAM

2 GB

An estimate based on typical usage, not a guarantee: real use grows with players, mods and world age.

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How this estimate works

We start from Terraria’s published server requirements (at least 1 GB), then add memory for each player, each of your tModLoader mods and your world size, and round up to a whole GB. It’s an estimate based on typical usage: a world that has been played for a long time, or heavy mods, can need more. Source for the minimum.