Cat years calculator
There is no size effect worth modelling in domestic cats — a Maine Coon and a Siamese age at broadly the same rate, unlike a Great Dane and a Chihuahua. What does change the picture enormously is indoor versus outdoor living: indoor cats commonly reach fifteen or more, while outdoor cats average considerably less, mostly through traffic, disease and predation rather than faster ageing.
A cat first year counts for about 15 human years and the second for nine, putting a two-year-old at 24. Each year after that adds roughly four, so a seven-year-old cat is about 44 in human terms.
How to convert cat years
Life stages matter more than the number for practical purposes. Veterinary guidance treats cats as kittens to six months, junior to two years, adult to six, mature to ten, senior to fourteen and geriatric beyond — with the recommendation that check-ups move from annual to twice yearly at around eleven. Cats hide illness extremely well, which is why age-appropriate screening rather than waiting for symptoms is the standard advice.
Questions
About 44 — mature adult rather than elderly.