Cat Age Calculator – Convert Cat Years to Human Years

Discover your cat's age in human years. Free cat age converter with breed & weight options plus vet‑style health tips.🐱

Use this free cat age calculator to instantly convert cat years to human years. Just enter your cat’s age, choose the breed, and (optionally) add their weight to see a more realistic human‑age estimate.

The calculator uses the common 15 + 9 + 4 rule (first year ≈ 15 human years, second year +9, and about +4 human years for every year after that), then adjusts slightly for breed traits and health.

Your Cat's Human Age

human years old

🏥 Health Tips for Your Cat

Cat Age vs Human Age Progression

Cat Life Stages at a Glance 🐾

Knowing which life stage your cat is in helps you match food, vet visits and play time to their real needs. These ranges are based on typical indoor cats using the same 15–9–4 rule as the calculator.

🐱 Kitten

0–1 years · up to ~15 human years

Fast growth: choose high-quality kitten food with plenty of protein.
Complete vaccination series plus parasite prevention are essential.
Lots of gentle handling and play builds confidence and good behaviour.

😺 Young Adult

1–6 years · roughly 15–40 human years

Maintain a stable, healthy weight – this is when obesity often starts.
Schedule at least one full vet check-up per year (exam + vaccines as needed).
Daily play (10–15 minutes) keeps joints, weight and mood in good shape.

🧡 Mature Adult

7–10 years · ~44–56 human years

Ask your vet about routine blood and urine tests to catch kidney or thyroid issues early.
Watch for subtle changes: drinking more, peeing more, Verstecken, or jumping less.
Consider slightly lower-calorie food while keeping protein reasonably high.

👑 Senior

11–14 years · ~60–72 human years

Plan vet visits at least every 6–12 months, even if your cat seems “fine”.
Make life easier: low-entry litter boxes, warm sleeping spots and easy-reach food bowls.
Monitor weight closely – both slow loss and steady gain can signal health issues.

🌙 Geriatric

15+ years · 76+ human years

Work with your vet on pain relief and comfort for arthritis or chronic diseases.
Offer soft, highly digestible food and encourage small, frequent meals if appetite is low.
Focus on quality of life: warmth, easy access to favourite spots and gentle interaction.

Cat Age Chart: Cat Years to Human Years

This cat age chart uses the same formula as the calculator above: the first year is roughly 15 human years, the second year brings your cat to about 24 human years, and every year after adds around 4 human years. These values are estimates for healthy indoor cats.

Cat age (years)	Human age (years)
1	15
2	24
3	28
4	32
5	36
6	40
7	44
8	48
9	52
10	56
11	60
12	64
13	68
14	72
15	76
16	80
17	84
18	88
19	92
20	96

Every cat is unique. Lifestyle, weight, and chronic conditions can make a cat seem “older” or “younger” than this chart suggests. Use these numbers as a rough guide and talk to your veterinarian if you have any concerns.