How old is my cat in human years? Cat age calculator and life stages
Work out your cat's age in human years with the International Cat Care chart and find out their life stage: kitten, young adult, mature or senior.
Enter your cat's age. The calculator uses the International Cat Care chart: a cat's first two years equal 24 human years, and each year after that adds about 4.
Cat age chart
| Cat's age | Human years |
|---|---|
| 3 months | 4 |
| 6 months | 10 |
| 1 year | 15 |
| 2 years | 24 |
| 5 years | 36 |
| 10 years | 56 |
| 15 years | 76 |
| 20 years | 96 |
A cat's life stages
| Stage | Cat's age | Human equivalent |
|---|---|---|
| Kitten | 0-6 months | 0-10 years |
| Junior | 7 months to 2 years | 12-24 years |
| Prime | 3-6 years | 28-40 years |
| Mature | 7-10 years | 44-56 years |
| Senior | 11-14 years | 60-72 years |
| Super senior | 15 years and up | 76 years and up |
What changes as your cat gets older
Cats are very good at hiding when something is wrong. From about age 7-8, kidney disease, hyperthyroidism, diabetes and dental problems become more common. So it's a good idea to:
- Schedule a checkup with blood and urine tests at least once a year.
- Watch whether your cat drinks more water than usual: it's one of the first signs of those illnesses. Learn how to measure it in cat drinking a lot of water.
- Keep an eye on their weight and adjust food. Work out how much they need with the pet food calculator.
Frequently asked questions
How old is a 1-year-old cat in human years?
About 15 human years. At 2, about 24.
At what age is a cat considered old?
International Cat Care describes cats as mature from 7 to 10, senior from 11 to 14, and super senior from 15.
How long do cats live?
It depends on genetics, health and care. International Cat Care includes a "super senior" stage from age 15 because many cats reach it. Regular checkups help catch the common illnesses of older age early.
Sources
This calculator gives a rough estimate based on the sources cited. It doesn't replace the judgment of a veterinarian who knows your pet.
