Zombie Invasion Calculator

Project a fictional 14-day infection scenario from zombies, population density, spread, and resistance.

964.3K uses Updated · 2026-05-24 Runs locally · zero upload
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How to Use Zombie Invasion Calculator

Enter the initial number of zombies, city population, city area, daily resistance capacity, and spread rate. The result is intentionally fictional: it estimates the infected count after 14 days and draws a trend so you can see whether resistance is keeping up with spread.

Formula & Theory - Zombie Invasion Calculator

The scenario advances one day at a time for 14 days:

density factor = population / city area / 1000
new infections = infected × spread rate × density factor - daily resistance
infected next day = infected today + max(0, new infections)

Population density makes crowded cities more fragile in the model, while daily resistance subtracts from the spread pressure. The infected count is capped at the city population. The bar chart is therefore a trend picture: it shows whether a fictional city is stabilizing, entering a danger zone, or passing the halfway-overrun point.

Use Cases for Zombie Invasion Calculator

  • Game scenarios - Tune spread and resistance values for a tabletop or party game.
  • Growth lessons - Show how density and countermeasures alter exponential-looking growth.
  • Entertainment pages - Create a playful calculator with visible assumptions.

Treat the numbers as story mechanics; the useful part is seeing how spread, density, and resistance push against each other.

Frequently asked questions about Zombie Invasion Calculator

Is this calculator scientific?

No. It is an entertainment model that borrows growth-model ideas but is not epidemiology or emergency planning.

What does daily resistance mean?

It is the number of potential new infections removed or prevented each day by survivors, defenses, shelters, or story rules.

Is my data stored?

No. All calculations happen in your browser; nothing is sent to a server.