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🎂 Dog and cat age in human years

"One year equals seven" is a myth. Dogs and cats grow up very fast in their first two years, and in dogs size changes how fast they age.

Life stage:

Age chart

Age (years)	Cat	Dog · Small	Dog · Medium	Dog · Large
1	15	15	15	15
2	24	24	24	24
3	28	28	28	28
4	32	32	32	32
5	36	36	36	36
6	40	40	42	45
7	44	44	47	50
8	48	48	51	55
9	52	52	56	61
10	56	56	60	66
11	60	60	65	72
12	64	64	69	77
13	68	68	74	82
14	72	72	78	88
15	76	76	83	93
16	80	80	87	99

How is this calculated?

We follow the widely used guideline (e.g. the AVMA): the first year equals about 15 human years and age two about 24. After that cats and small dogs add about 4 years per year, medium dogs about 5, and large dogs about 6–7.

Breed, health and lifestyle change how fast an individual ages. From around age 7, a vet check-up at least once a year is a good idea.

Age (years)	Cat	Dog · Small	Dog · Medium	Dog · Large
1	15	15	15	15
2	24	24	24	24
3	28	28	28	28
4	32	32	32	32
5	36	36	36	36
6	40	40	42	45
7	44	44	47	50
8	48	48	51	55
9	52	52	56	61
10	56	56	60	66
11	60	60	65	72
12	64	64	69	77
13	68	68	74	82
14	72	72	78	88
15	76	76	83	93
16	80	80	87	99

Age (years)	Cat	Dog · Small	Dog · Medium	Dog · Large
1	15	15	15	15
2	24	24	24	24
3	28	28	28	28
4	32	32	32	32
5	36	36	36	36
6	40	40	42	45
7	44	44	47	50
8	48	48	51	55
9	52	52	56	61
10	56	56	60	66
11	60	60	65	72
12	64	64	69	77
13	68	68	74	82
14	72	72	78	88
15	76	76	83	93
16	80	80	87	99

Age (years)	Cat	Dog · Small	Dog · Medium	Dog · Large
1	15	15	15	15
2	24	24	24	24
3	28	28	28	28
4	32	32	32	32
5	36	36	36	36
6	40	40	42	45
7	44	44	47	50
8	48	48	51	55
9	52	52	56	61
10	56	56	60	66
11	60	60	65	72
12	64	64	69	77
13	68	68	74	82
14	72	72	78	88
15	76	76	83	93
16	80	80	87	99