Vampire Apocalypse Calculator

Your details

Each preset loads a different set of aggression and conversion rates inspired by popular vampire fiction.
Starting number of humans. Think of this as a city, region, or the whole planet.
How many vampires exist at the start of the outbreak.
Vampire hunters or slayers who actively kill vampires. Set to 0 for a world with no resistance.
How far into the future to run the simulation.
OutcomeHumanity falls
Extinction in ~0 years

Whether humanity survives, reaches a balance, or faces extinction.

Time until vampires outnumber humansNever (within simulation window)
Humans at end of simulation0
Vampires at end of simulation1,534,380
Slayers at end of simulation0
Peak vampire population1,534,515
Year of human extinction (if any)Year 0
Humans (end)0
Vampires (end)1,534,380
Slayers (end)0

Extinction in ~0 years

  • The vampire population peaks at 1,534,515 individuals during the simulation.
  • Humans remain the majority throughout the entire 100-year simulation window.
  • The Lotka-Volterra model assumes constant parameters. Real outbreaks would trigger behavioral adaptation, government response, and cultural change that the model cannot capture.

Next stepTry adjusting the slayer population upward to see at what threshold an organized resistance can hold back the outbreak.

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