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Project Zomboid
Zombie Survival · Isometric · The Indie Stone
Project Zomboid Server RAM: How Much Do You Really Need?
Project Zomboid server RAM: the community rule of thumb (~6 GB base + 0.5 GB per player), recommendations by player count and matching RespawnHost packages.
Last updated July 20, 2026 · RespawnHost
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The rule of thumb: ~6 GB base + 0.5 GB per player
As a community rule of thumb (several consistent sources, no official figure), a Project Zomboid server needs around 6 GB of RAM as a base plus about 0.5 GB per player. That puts 2–4 players at roughly 8 GB and 8–16 players at 12–16 GB. Mods — especially map mods — increase the requirement significantly.
Note
These figures are a community rule of thumb, not an official system requirement. Watch your server's real usage and leave generous headroom when running mods.
How much RAM for how many players?
| Players | RAM (rule of thumb) | Matching RespawnHost package |
|---|---|---|
| 2–4 | approx. 8 GB | 8 GB — €15.20/month |
| 5–8 | approx. 8–10 GB | 10 GB — €18/month |
| 9–16 | approx. 12–14 GB | 14 GB — €23.80/month |
| 16–20 | approx. 14–16 GB | 20 GB — €32/month |
| Many mods / map mods | significantly more | 20–24 GB — €32–36/month |
Warning
For Build 42 multiplayer, The Indie Stone currently recommends fewer than 20 players anyway — details in the Build 42 server guide.
Which RespawnHost packages are available?
Project Zomboid servers at RespawnHost start from €8/month — as a fixed package or billed per second with pay-per-use:
| Package | Price/month |
|---|---|
| 4 GB | €8 |
| 8 GB | €15.20 |
| 10 GB | €18 |
| 14 GB | €23.80 |
| 20 GB | €32 |
| 24 GB | €36 |
The 4 GB package is fine for testing — for continuous play with friends, the rule of thumb (6 GB base) suggests at least the 8 GB package. All packages: Rent a Project Zomboid Server
What drives RAM usage up?
- Mods — especially map mods increase the requirement significantly
- Player count — roughly +0.5 GB per additional player (rule of thumb)
- Self-hosting: Project Zomboid runs on Java — you allocate RAM to the server via the
-Xmxstart parameter
Frequently asked questions
Is 4 GB of RAM enough for a Project Zomboid server? For testing, yes — for continuous play, the community rule of thumb suggests around 6 GB base, so go with the 8 GB package.
How much RAM do I need for 10 players? By the rule of thumb, around 11 GB (6 + 10 × 0.5) — the 14 GB package gives you headroom for mods.
Is the rule of thumb official? No — it comes from the community (several consistent sources). Keep an eye on your server’s actual usage.
Do mods increase RAM usage? Yes, significantly — map mods above all. With a modded server, plan one or two package tiers larger.
Related guides
- Creating a Build 42 server — setup at RespawnHost & self-hosted
- Server settings (servertest.ini) — slots, mods & ports
- Sandbox settings — zombies, loot & XP