Dog Age Vs. Human Age

How to properly determine a dog’s age in human years

 

It’s easy right? Take a dog’s real age and multiply it by seven. Actually, that is the human age if average the aging rate for all breeds. Veterinarians and animal rescue organizations have been using a different age system for a long time but the public is just now starting to catch on.

 

One thing that sets dogs apart from all other species is that different sizes age at different rates. To correctly determine your dog’s age in human years you need the age and the size of the dog. Because dogs reach adulthood faster, the formula has an aging rate that is much faster than humans when they are juveniles, but that rate slows quickly.

 

Looking at the chart below you will notice that a dog ages 15 human years in one year. This means is that a 15-year-old human and a 1-year-old dog are at the same point in physical maturity. After adulthood, the aging rate slows to 4 times that of humans for small dogs, around 5 for medium, and between 5 and 6 for large breeds. Using the common system for aging, all 10-year-old dogs should have a similar energy level to that of a 70-year-old human. Using the more advanced system, we see that all breeds are below that, especially for small breeds.

 

 

Age of dog Small breed –
age in human years
Medium breed –
age in human years
Large breed –
age in human years
1 15 15 15
2 24 24 24
3 28 28 28
4 32 32 32
5 36 36 36
6 40 42 45
7 44 47 50
8 48 51 55
9 52 56 61
10 56 60 66
11 60 65 72
12 64 69 77
13 68 74 82
14 72 78 88
15 76 83 93
16 80 87 120

 

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