Informational Articles & Resources

Always consult your vet about the health and care of your animals and pets.

How old is my dog or cat in human years?

When it comes to pets, there are a number of theories for determining how old your dog or cat is in human years. Over the years a number of changes have been made to that system and today here at Sun Valley Animal Hospital, we want to share the most recent thoughts.

Determining Your Pet’s Age in Human Years

A number of things can influence just how “old” your pet would be in human years but most particularly, their weight for dogs and whether they are an indoor or outdoor cat.

Dog’s Age Dogs 0-20 lbs Dogs 21-50 lbs Dogs 51-90 lbs Dogs >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
18 88 96 109
19  92 101 115
20 96 105 120
Cat’s Age Indoor Cats Outdoor Cats
6 40 56
7 44 64
8 48 72
9 52 80
10 56 88
11 60 96
12 64 104
13 68 112
14 72 120
15 76
16 80
17 84
18 88
19 92
20 96

Our resources and articles originate from other sources such as VetStreet and PetMD, and are meant for general pet care information. Please contact our office directly for specific questions concerning your pets or any other animals you may come into contact with.

SVAH2webeditsHow old is my dog or cat in human years?