Free Cat Age Calculator (+ Guide)

What is a cat age calculator?

A cat age calculator turns a cat's age into the human age it's most like.

Cats grow up fast: a 6-month-old cat is like a 10-year-old child, and a 1-year-old like a 15-year-old. Then they slow right down.

How the cat age chart works

The calculator follows International Cat Care's chart, which vets in its Cat Friendly Clinic programme hand to owners.

So an 8-year-old cat is 24 + 6 × 4 = 48. A 16-year-old is 80, and a 20-year-old 96.

The 6 life stages

Each stage needs different care, which is why the stage matters more than the number.

The stages match the 2021 AAHA and AAFP Feline Life Stage Guidelines, which vets use to plan checkups.

A worked example

Here's the example the calculator loads: a cat 8 years old.

The first 2 years make 24. The 6 years after add 6 × 4 = 24. So 24 + 24 = 48 human years.

At 8, the cat is in the mature stage, and it turns senior at 11, in 3 years. By ×7, it would be 56.

Mistakes to avoid

These are the ways cat ages get misread.

• Using ×7: it makes young cats far too young
• Treating a junior cat as a kitten: by 1, a cat is fully grown
• Waiting for signs of age before senior checkups: cats hide pain well
• Guessing a rescue cat's age without asking a vet, who can tell from the teeth

Who is the cat age calculator for?

It's for any cat owner, and these tools help around it.

• Dog age calculator – for your dog's age in human years
• Age calculator – for your own age to the day
• Currency converter – for vet bills abroad

Your cat is older than it looks, so book the checkup that matches its stage.