Dog Years Chart 2Dog Years Chart 2Dog Years Chart 2
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“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