Dog age calculator

How old is my dog in human years?

Dogs grow up fast in their first two years, then age at different speeds depending on their size. Enter your dog's age and size to find out.

Your dog is about37in human years

Adult

Keep up the daily walks and a yearly vet check to stay fit and happy.

Find dog-friendly places near you

How dog years work

15
A dog's first year is about 15 human years: they grow up fast.
+9
Their second year adds about 9 more, making 24.
After that, bigger dogs age faster than small ones, so their size matters.

See the full dog years chart

Dog age	Small	Medium	Large	Giant
1 year	15	15	15	15
2 years	24	24	24	24
3 years	28	28	30	32
4 years	32	33	35	37
5 years	36	37	40	42
6 years	40	42	45	49
7 years	44	47	50	56
8 years	48	51	55	64
9 years	52	56	61	71
10 years	56	60	66	78
11 years	60	65	72	86
12 years	64	69	77	93
13 years	68	74	82	101
14 years	72	78	88	108
15 years	76	83	93	115
16 years	80	87	99	123
17 years	84	92	104	–
18 years	88	96	109	–
19 years	92	101	115	–
20 years	96	105	120	–

Based on the size-by-age chart from the American Animal Hospital Association (AAHA). Every dog is different, so treat this as a fun guide, and talk to your vet about your own dog's health.