Did you know… one unfixed female cat can lead to the births of over 400,000 cats in just 7 years?
That’s not a typo. It’s a mathematical chain reaction—because cats multiply fast, and most of them are never seen.
We call it the Stray Cat Calculator and it’s the reason we trap, neuter, and return (TNR). Because when you fix one, you’re actually preventing thousands of future births.
Want to see how fast it grows? Plug your numbers into the Stray Cat Calculator and get ready for a shock.
| Year | Simple Model (N = N₀ × 1.87ˣ) | Precise Model (N = 1.6 × N₀ × 1.367²ˣ) |
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The TNRPRO Stray Cat Calculator is a mathematical model based on simplified assumptions about feline reproduction, survival, and population dynamics. It is intended for general informational purposes only and should not be relied upon for precise predictions or management decisions in real-world scenarios. Actual cat populations may vary significantly due to factors such as limited food or habitat, disease, predation, human interventions (e.g., trapping or feeding), seasonal breeding variations, or other environmental constraints not accounted for in the model. The model assumes exponential growth, which may not hold for long periods due to carrying capacity limits. Users should consult with veterinarians, ecologists, or local animal control authorities for accurate assessments and management strategies for stray cat populations. The model’s results are approximations and should be interpreted with caution, especially for long timeframes or specific local conditions.