How Old is My Dog or Cat? – Animal Health Associates

July 23, 2020 by LakefieldVet

We all know that our pets age faster than us… but how much? The old “seven year” rule was simple, but does not really work beyond the first year. In addition, pets that are larger age faster. This chart, assembled from data available through the AAFP and IDEXX Labs, shows how old your pet is in dog or cat years, based on his or her weight.

	Cats	Dogs
Age	0-20 lb	0-20 lb	20-50 lb	50-90 lb	> 90 lb
1	15	7	7	8	9
2	24	13	14	16	18
3	28	20	21	24	26
4	32	26	27	31	34
5	36	33	34	38	41
6	40	40	42	45	49
7	44	44	47	50	56
8	48	48	51	55	64
9	52	52	56	61	71
10	56	56	60	66	78
11	60	60	65	72	86
12	64	64	69	77	93
13	68	68	74	82	101
14	72	72	78	88	108
15	76	76	83	93	116
16	80	80	87	99	123
17	84	84	92	104	131
18	88	88	96	109	139
19	92	92	101	115
20	96	96	105	120
21	100	100	109	126
22	104	104	113	130
23	108	108	117
24	112	112	120
25	116	116	124

Legend
Young
Adult
Senior
Geriatric