PZ Zombie Population Calculator
See exactly what your population multiplier settings mean in practice — estimated zombie density per cell as population ramps from start to peak over time.
Population Settings
Overall multiplier applied to the world's zombie density
Population fraction at Day 1
Population fraction at peak day
Day the population reaches its maximum
Estimated Zombies Per Cell
| Day | Eff. Mult | Urban / Cell | Rural / Cell |
|---|---|---|---|
| Day 1 | 0.39x | ~254 | ~50 |
| Day 7 | 0.64x | ~414 | ~82 |
| Day 14 | 0.92x | ~601 | ~120 |
| Day 28 | 1.50x | ~975 | ~195 |
| Day 60 | 1.50x | ~975 | ~195 |
Urban base: ~650 zombies/cell at 1.0x. Rural base: ~130 zombies/cell (20% of urban). A "cell" is a 300×300 tile chunk group.
Game Mode Comparison — Urban Zombies at Day 28
| Mode | PopMult | Urban/Cell |
|---|---|---|
| Initial Infection | 0.5x | ~487 |
| Apocalypse | 1.0x | ~975 |
| Survivor | 1.0x | ~975 |
| Builder | 0.2x | ~65 |
| One Week Later | 1.0x | ~1300 |
| Six Months Later | 3.0x | ~5850 |
Respawn System Explained
Zombies only respawn in chunks that have been unseen for at least RespawnUnseenHours (default 16 hours).
The RespawnHours timer (default 72h) controls how often the game checks if unseen chunks can be refilled.
RespawnMultiplier (default 0.1) controls what fraction of the original population returns each cycle — so at 0.1x,
roughly 10% of zombies come back per check. Set RespawnHours = 0 to disable respawning entirely.
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