Project Zomboid Server Memory Calculator

Project Zomboid Server Memory CalculatorUse this tool to estimate how much RAM your Project Zomboid server needs based on player count, mods, and game version. Remember the rule of thumb: ~0.5 GB per player plus overhead for mods and the game itself.

            Number of Players:
            
            Mod Usage:
            
            Game Version:
            
            Host Machine:
            
Recommended RAM Allocation4 GB
-Xmx4096m

                ■ Base (2GB)
                ■ Players (4GB)
                ■ Mods (1GB)
            
        Memory Usage Breakdown
        Base Usage: 2 GB - Minimum required for the server itself
Player Usage: 4 GB - Memory needed for players (0.5 GB per player)
Mod Usage: 1 GB - Additional memory for mods
Host Overhead: 0 GB - Reserved for OS if sharing a PC

        Tips & Notes
        Edit your startserver.bat (Windows) or ProjectZomboid64.json (Linux) file to update the -Xmx value to the recommended amount.
Monitor your server memory usage with the in-game Statistics panel (admin command: /stopwatch).
Consider scheduling regular server restarts (e.g., daily) to clear memory, especially for heavily modded servers.
Build 42 generally requires more RAM than Build 41 due to enhanced texture caching.
Don't allocate more RAM than your host machine has available, leave at least 2-4 GB for the operating system.