Cat Age Calculator
Find out how old your cat is in human years.
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How this is calculated
Follows the AAFP/AAHA Feline Life Stage Guidelines (2021): first year ≈ 15 human years, second ≈ 24 total, then ~4 per year. Life stages: kitten <1, young adult 1–6, mature adult 7–10, senior 11+.
Source-based educational tool; not independently reviewed by a veterinarian. Cited guidance does not imply endorsement by its authors.
Formula
Year 1 = 15 · Year 2 = 24 · each later year = +4
Assumptions
- •Applies to domestic cats of all breeds
- •Life stages by cat age, not human years