Dog Age Conversion ChartDog Age Conversion Chart
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Dog Age Conversion Chart
Dogs also vary in how quickly they age. In general, small breeds live longer than large
ones-occasionally, twice as long.
The chart below indicates average figures for all breeds of dogs, based on their size. The
numbers in bold indicate that the dog is considered senior; the numbers in italics indicate
that the dog is considered geriatric.
A Dog’s Age in Human Years
Canine Age

Human Years
Up to 20 pounds

21-50 pounds

51-90 pounds

Over 90 pounds

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