Free tool
Minecraft Modpack RAM Calculator
Search a modpack, set your player count, and get a realistic starting RAM plan. Best estimates come from tested Modrinth and CurseForge recipes, with fallbacks when exact data is missing.
Players8
This adds about 1 GB of headroom per 6 extra players after the first 4.
How to use this number
The calculator gives you a starting plan, not a guaranteed ceiling. Modpack performance depends on world size, automation, chunk loading and how aggressively your players progress.
If you are choosing between two sizes, start with the safer one for heavy packs. A server that boots with enough headroom converts better than one that crashes during the first mod load.
For more guidance, see our Minecraft modpack hosting page and the full RAM guide.