🐾 Dog · Cat

Your animal age in human years

The “×7” rule is wrong: a one-year-old dog is already a teenager, not a 7-year-old child. Enter the date of birth (or the age) and get the human equivalent using the veterinary formula.

Species

Dog size (adult)

Year of birth

… or age in years

The full conversion table

Actual age	Small dog	Medium dog	Large dog	Cat
1 year	15	15	15	15
2 years	24	24	24	24
3 years	28	29	30	28
4 years	32	34	36	32
5 years	36	39	42	36
6 years	40	44	48	40
7 years	44	49	54	44
8 years	48	54	60	48
9 years	52	59	66	52
10 years	56	64	72	56
11 years	60	69	78	60
12 years	64	74	84	64
13 years	68	79	90	68
14 years	72	84	96	72
15 years	76	89	102	76
16 years	80	94	108	80

Why “×7” is wrong

A dog reaches sexual maturity before age 1 and a one-year-old cat already equals a 15-year-old human: ageing is not linear. It is very fast during the first two years (≈15 then ≈9 human years), then slows down — and large dogs age faster than small ones. That is the formula vets use, and the one behind this calculator.

⚕️ This conversion is an indicative average. Breed, lifestyle and health make real ageing vary: your veterinarian remains the best judge of your animal biological age.

Your animal is getting older? A yearly veterinary check-up helps age in good health. Find a practitioner near you.

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