Vampire Apocalypse Calculator
Simulate vampire vs human population dynamics using predator-prey models
Choose Scenario
Dracula's Invasion (1897)
Inspired by Bram Stoker's Dracula. One vampire starts the apocalypse in 1897.
Salem's Lot Outbreak
Based on Stephen King's Salem's Lot. Small town vampire outbreak.
Modern Vampire War
Contemporary scenario with organized vampire slayers.
Custom Scenario
Create your own vampire apocalypse scenario.
Simulation Settings
Simulation Results
Humanity saved! Vampires defeated after 0.0 months
Humanity has successfully defended itself!
Population Over Time
Interactive chart would be displayed here
Showing humans (blue), vampires (red), and slayers (yellow)
Vampire Facts 🧛
Hematophagy
Feeding on blood, practiced by many real animals
Nocturnal
Active during night, vulnerable to sunlight
Supernatural
Enhanced strength, speed, and regeneration
Lotka-Volterra Model
Predator-Prey Dynamics
Based on ecosystem mathematical models
Human Population
dx/dt = x(k₁ - a₁y)
Vampire Population
dy/dt = y(b₁a₁x + b₂a₂y - cz)
Slayer Population
dz/dt = z(k₂ - a₂y)
Real Bloodsuckers 🦇
Vampire Bats
Share blood with hungry colony members
Leeches
Used medicinally to restore blood flow
Mosquitoes
Only females suck blood for egg production
Vampire Finches
Drink blood when other food is scarce
Understanding the Vampire Apocalypse Model
What is the Model Based On?
This calculator uses the Lotka-Volterra equations, also known as the predator-prey model. Originally developed to describe ecosystems like foxes and rabbits, we've adapted it to simulate the dynamics between humans (prey), vampires (predators), and vampire slayers (protectors).
Key Populations
- 👥Humans: Grow exponentially but can be turned into vampires
- 🧛Vampires: Hunt humans and slayers, can only reproduce by turning humans
- ⚔️Slayers: Organized hunters dedicated to eliminating vampires
Special Abilities
Human Resilience
When endangered, humans reproduce faster to preserve the species
Vampire Intelligence
Smart vampires preserve their food source when humans become scarce
Slayer Organization
Limited by resources and recruitment capabilities
Mathematical Foundation: The model uses differential equations to predict population changes over time, accounting for birth rates, death rates, and transformation probabilities.