Cat age calculator
Find out how old your cat is in human years using the standard feline life-stage chart that vets rely on.
In human years, your cat is about
28
human years old
How the cat age calculator works
Cats grow up quickly. By their first birthday a cat is roughly the equivalent of a 15-year-old human, and by age two they are around 24. From there, each additional year adds about 4 human years, so the math is steady and easy to follow once a cat is fully grown.
Knowing your cat's life stage helps you feed and care for them correctly. Kittens need a lot more energy per pound than adults, while senior cats often need fewer calories and closer monitoring for things like kidney health and weight changes. Check daily feeding with our cat calorie calculator.
Remember this is a general estimate. Breed, genetics, diet, and whether your cat lives indoors all affect how they age. The best thing you can do is keep regular vet visits and feed food that suits their stage of life. Not sure about an ingredient? Our ingredient guide explains what to look for.
Frequently asked questions
How do you calculate a cat's age in human years?
A cat's first year is about 15 human years, the second adds 9 more to reach 24, and every year after that adds roughly 4 human years. So a 5-year-old cat is around 36 in human terms. This calculator uses that standard feline life-stage chart.
Do indoor and outdoor cats age differently?
The year-to-year math is the same, but indoor cats tend to live longer on average because they avoid traffic, predators, and many infections. The number this tool gives you is a general estimate regardless of lifestyle.
When is a cat considered senior?
Cats are generally considered mature from about 7 years and senior from around 11. Many cats live well into their late teens, so a senior cat can still have many good years ahead with the right care and diet.
Why don't you multiply a cat's age by 7?
Because cats mature very quickly early on, then age more gradually. Multiplying by 7 misses both stages. The life-stage method used here matches feline development much more closely.
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Scan your first label freeThis calculator gives general guidance only, not veterinary advice. Always consult your veterinarian for medical decisions about your pet.