About CatAgeCalc

A free, fast and honest cat age calculator for cat owners.

Our mission

Cat owners often hear that one cat year equals seven human years. It is a myth. CatAgeCalc exists to give you a clear, vet-guideline-based answer to “how old is my cat in human years?” and to explain what that means for care.

What we offer

• A cat age calculator that converts cat to human years, human to cat years, or works from a birthday.
• A cat age chart covering kittens to 21-year-old cats.
• A blog covering life stages, kitten growth, senior care and lifespan.

How we keep information accurate

Our conversions follow the widely used AAHA, AAFP and International Cat Care feline life-stage chart. Under 2 years we interpolate month by month; after that we add 4 human years per cat year. When we publish guidance we base it on established veterinary sources and update pages when guidance changes.

Important note

CatAgeCalc is an educational website run by a small editorial team of cat-loving site builders. We are not veterinarians. Nothing here replaces advice from a qualified vet. Read our disclaimer for details.

Contact

Found an error or have an idea? Visit the contact page.