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The Associated Press Global News By Linda Lombardi, So 1 dog year equals 7 human years? Not quite, says animal expert
University of Chicago Press Journals, Cornelia Kraus, Samuel Pavard, Daniel E. L. Promislow, Associate Editor: Franz J. Weissing, and Editor: Mark A. McPeek, The Size–Life Span Trade-Off Decomposed: Why Large Dogs Die Young.
Dog age calculator finds the age of your dog in equivalent human years by considering specific breed characteristics or weight range.
One year of a dog’s life is equal to seven years of a human. Ancient people believed that dogs age faster than humans. The American Veterinary Medical Association categorizes it as follows:
The misconception that 1 human year equals 7 dog years was popularized in the 1950s based on assumptions about average lifespans.
The formula to figure out the dog’s age varies from breed to breed. The general formula is:
Human Years to Dog Years = ( Human Years – 2 ) x 4 + 21
Generally, dog breeds have been divided into followings and their age increases at different speeds.
Breed Size | Average Life Span |
---|---|
Small or Toy Breed (less than 20 pounds) | 10-15 years |
Medium Breed (20 to 50 pounds) | 10-13 years |
Large Breed (50 to 90 pounds) | 8-12 years |
Giant Breed (more than 90 pounds) | 8-10 years |
As dogs age, they might display various signs indicating the normal aging process. Common signs of aging in dogs include:
In fact, smaller dogs live longer than large dogs. Current studies indicate that a dog’s life expectancy is decreased by 1 month for every 2 kilograms of body mass. General reasons are as follows:
To use a dog age calculator, simply input the required values and the calculator will provide you with the equivalent age in human years.
Required Values:
Results Summary:
Here’s how old is a dog in human years compared with human age. Note that this dog age calculator is for the every-size breed of a dog below 20 years. Consult the chart to see the difference between various sizes of dogs;
Years | 20 lbs or less | 21-50 lbs | 51-100lbs | 100+ lbs |
1 year | 15 | 15 | 15 | 12 |
2 years | 24 | 24 | 24 | 22 |
3 years | 28 | 28 | 28 | 31 |
4 years | 32 | 32 | 32 | 38 |
5 years | 36 | 36 | 36 | 45 |
6 years | 42 | 42 | 45 | 49 |
7 years | 47 | 47 | 50 | 56 |
8 years | 51 | 51 | 55 | 64 |
9 years | 56 | 56 | 61 | 71 |
10 years | 60 | 60 | 66 | 79 |
11 years | 65 | 65 | 72 | 86 |
12 years | 69 | 69 | 77 | 93 |
13 years | 74 | 74 | 82 | 100 |
14 years | 78 | 78 | 88 | 107 |
15 years | 83 | 83 | 93 | 114 |