Estimate your cat's age in human years and life stage, then monitor sudden hiding, appetite, or body-language changes.
Estimated human age
28
human years
Life stage
Adult
This is an educational estimate. Breed, body condition, medical history, and activity level can change aging patterns.
How accurate is this cat age calculator?
The estimate is a guideline based on widely-cited feline life-stage models from the American Association of Feline Practitioners (AAFP) and the International Cat Care Senior Cat Programme. Compared to dogs, cat aging is more uniform across breeds because feline body sizes vary less. Real biological age still depends on indoor vs outdoor lifestyle, neuter status, body condition, dental health, and individual genetics. Use the calculator to time wellness checks and behavior monitoring — not as a substitute for a veterinary exam.
Why does indoor vs outdoor change cat aging?
Indoor cats commonly live 12-18 years; outdoor-only cats average 2-5 years due to traffic, predators, infectious disease, and accidents. Lifestyle is the single biggest factor in cat lifespan after genetics. A 7-year-old indoor cat is roughly 44 in human years and still in early adulthood; the same age outdoors carries far higher mortality risk regardless of biological aging. The calculator assumes a typical indoor-cat trajectory.
What senior cat signs should I watch for?
Senior cats hide pain better than dogs do, so subtle behavior shifts matter more than dramatic ones. Watch for increased hiding, drop in grooming (matted coat, oily fur), changes in litter-box habits, weight loss despite normal appetite, raspy meows or vocalizing at night, less jumping, and reluctance to be handled around the spine or hips. Many of these overlap with stress signals — use the checker for visible cues and the body-language guide to compare.
How does cat aging compare to dog aging?
Cats age more uniformly than dogs because feline body sizes vary less. A 7-year-old cat is roughly 44 in human years across breeds; a 7-year-old dog can be anywhere from 44 to 65 human years depending on size. Cats also typically outlive large dogs (14-18 years vs 7-10), and a senior cat's medical baseline shifts more around dental disease, kidney function, and hyperthyroidism, where senior dog baselines lean more toward joint and cardiac issues.
When should I take my senior cat to the vet?
AAFP recommends twice-yearly wellness visits once a cat reaches the mature life stage (around age 7) and routine bloodwork plus blood pressure checks at every visit once a cat is senior (around age 11). Sooner if you see sudden behavior change, weight loss with or without increased appetite, vomiting more than once a week, changes in water intake, or any combination of warning signs at the same time. The calculator's life-stage label is a useful prompt for booking the next check-up.