How much RAM does a Project Zomboid server need?

Q: How much RAM does a Project Zomboid server need?

About 6 GB for 6 players without mods, and never less than 6 GB. Project Zomboid's memory grows with players, explored map and map mods; Workshop mods add up quickly. This is an estimate based on typical usage.

Project Zomboid server RAM calculator

Project Zomboid's memory grows with players, explored map and map mods; Workshop mods add up quickly.

Recommended RAM

6 GB

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

Run it on your own PC, free

Coming soon: in final testing

Use a computer you already have, with at least 10 GB of RAM (6 GB for the server, the rest for the system). Cosmic Warp's Free plan runs one server.

Warp Hosted

We run it on a 8 GB server for $20.99/month. Backups, game swaps and the dashboard included.

Get a 8 GB server →

How this estimate works

We start from Project Zomboid’s published server requirements (at least 6 GB), then add memory for each player, each of your Workshop mods and your how much of the map is explored, 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.