Dog and Cat Years Conversion Chart

“MY DOG IS HOW OLD?”
Canine aging is much more rapid during their first two and a half years. Around 3
years of age, the ratio defers from different breeds.
Small sized dogs ~ 1 calendar year to 4 dog years
Medium sized dogs ~ 1 calendar year to 4½ dog years
Large sized dogs ~ 1 calendar year to 5½ dog years
Giant breeds ~ 1 calendar year to 7½ dog years
The relative age of different-sized dogs varies through life. Given the different life
expectancies of small to giant breeds, two dogs of exactly the same age may in fact be
at very different stages in their lives.
Dog
Years
Small
3 20 lbs
Medium
21 55 lbs
Large
56 88 lbs
Giant
89 lbs +
1 6 months
10
10
10
10
7 12 months
16
16
16
16
13 18 months
20
20
20
20
19 30 months
24
24
24
24
3
28
29
30
31
4
32
33
35
36
5
36
37
40
42
6
40
42
45
49
7
44
47
50
56
8
48
52
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
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