Turn a cat's age into human years using the standard growth curve.
A cat ages quickly in its first year, reaching about fifteen human years, then slows so the second year totals twenty-four. Every year after that adds roughly four human years. Knowing a cat's true equivalent age helps you plan diet, exercise and veterinary screening at the right time of life.
Cat Age in Human Years
First year = 15; second year adds 9; each later year adds 4
First year = 15; second year adds 9; each later year adds 4 A cat ages quickly in its first year, reaching about fifteen human years, then slows so the second year totals twenty-four. Every year after that adds roughly four human years.
Knowing a cat's true equivalent age helps you plan diet, exercise and veterinary screening at the right time of life.
This calculator takes 1 input: Cat age. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.