How Old Is This Dog

A Dog's Age in Human Years
Age	Up to 20 lbs	21-50 lbs	51-90 lbs	Over 90 lbs
5	36	37	40	42
6	40	42	45	49
7	44	47	50	56
8	48	51	55	64
9	52	56	61	71
10	56	60	66	78
11	60	65	72	86
12	64	69	77	93
13	68	74	82	101
14	72	78	88	108
15	76	83	93	115
16	80	87	99	123
17	84	92	104	Red numbers = senior Blue numbers = geriatric
18	88	96	109
19	92	101	115
20	96	105	120
Chart developed by Dr. Fred L. Metzger, DVM, State College, PA. Courtesy of Pfizer Animal Health.