Are you interested in knowing the age of your dog using their age chart? Many studies say that one dog year is equivalent to seven human years and while some agree, others tend to disagree.
If asked, we all would want our dogs to live eternally so we can enjoy their loyalty, friendliness, and much more endlessly. Unfortunately, our canine friends only live for a limited amount of time and knowing the dog age chart will help us relate better with them as they age. Different dog breeds have unique age charts as some live longer and others shorter.
Today, we shall look into the calculation of dog age, the dog age chart based on different factors such as weight, teeth, breed, and size, as well as their age in human years. By the end of this topic, you will have an answer to all your questions to end the confusion.
What is the dog age chart?
The dog age chart refers to a table that compares the age of a dog to that of humans based on their size (small, medium, large, and giant). The chart helps you calculate the real age of your canine friend without assumptions depending on your dog breed and size.
How to determine or calculate the dog age
The most straightforward method to calculate or determine the real age of your dog is by multiplying 1 dog year by 7 years. How so you may ask? As said earlier, it is an assumption stating that on average, humans live approx. 70 years while dogs have a lifespan of 10 years.
If your dog is 4 years old, for instance, that is 28 human years.
The most precise way to determine or calculate the dog age, however, is different from the above as displayed by data from different bodies such as vet hospitals, pet-insurance companies, and breed-club surveys. The ageing rate of a dog is not consistently 7 human years. Instead, the number of human years heaps onto a pooch’s life more rapidly during his or her fast growth to maturity.
According to these statistics from the American Veterinary Medical Association (AVMA), a medium-size dog 1st year equals 15 human years and the 2nd year approx. 9 human years. After this, each human year is equivalent to about 4 or 5 human years.
How to calculate small dog age
Just like any other dog breed, calculating a small dog’s age uses three principles where the first dog year is equivalent to 15 human years. The dog’s second year equals approx. 9 human years and after that each extra dog year equals to approx. 4 to 5 human years.
How old is my dog chart
Check out our chart below if you wish to know how old your dog is.
|Size of Dog||Small-Size Dogs||Medium-Size Dogs||Large-size dogs|
|Age of Dog||Age in Human Years||Age in Human Years||Age in Human Years|
Table 1: Your dog’s age in human years [Courtesy of WebMD]
Dog age chart based on weight
Here is a dog age chart based on weight:
|Dog Age||1 – 20 lbs.||20 – 50 lbs.||50 – 90 lbs.||Above 90 lbs.|
Table 2: Dog age chart based on weight
Dog age chart in months
|Dog Age||Human Age|
|2 months||1 year 2 months|
|6 months||5 years|
|8 months||9 years|
|1 year||15 years|
|2 years||24 years|
|3 years||28 years|
|4 years||32 years|
|7 years||37 years|
|8 years||47 years|
|9 years||52 years|
|10 years||57 years|
|11 years||67 years|
|12 years||72 years|
|13 years||77 years|
|14 years||82 years|
Table 3: Dog age chart in months
Dog age chart by breed
Dog breeds are divided into small, medium, large, and giant.
|Age of Dog||Age in Human Years for small dogs||Age in Human Years for medium dogs||Age in Human Years for large-size dogs||Age in Human Years for giant dogs|
Table 4: Dog age chart by breed
Calculate dog age by breed
Different dog breeds age in a different way which means that small and large dog breeds will not age alike. To calculate dog age by breed, take their age against the calculation principle mentioned above (1st dog years = 15 human years, 2nd dog year = 9 human years & 4-5 human years after that).
Dog age chart for Different Dog Breeds:
There are more than 400 different breed of dogs globally which are all unique in the way they age and progress. From toy or small dog breeds like the Yorkshire Terriers (Yorkies) and Chihuahuas to medium-size dog breed like a Siberian Huskies and large dog breeds such as the German Shepherds and Golden Retrievers, all these dogs have different timetables when it comes to ageing.
Here are the dog age charts for:
German Shepherd Age Chart
The German Shepherd is a medium-to-large sized dog breed with a life expectancy of 9 to 13 years. Here is the dog age chart for the German Shepherd:
|German Shepherd Years||Human years|
Yorkies Age Chart
The Yorkshire Terrier or Yorkie is a toy or small size dog breed with a life expectancy of 13 to 16 years. Here is the dog age chart for the Yorkies:
|Yorkie years||Human years|
Chihuahua Age Chart in Human Years
The Chihuahua is a toy or small sized dog breed with a life expectancy of 12 to 20 years. Here is the dog age chart for the Chihuahua:
|Chihuahua Years||Human years|
Siberian Husky Age Chart
The Siberian Husky is a medium-sized dog breed with a life expectancy of 12 to 15 years. Here is the dog age chart for the Siberian Husky:
|Siberian Husky||Human Years|
The Golden Retriever is a medium-to-large size dog breed with a life expectancy of 10 to 12 years. Here is the dog age chart for the Golden Retriever:
|Golden Retriever Years||Human years|
Dog age chart by size
|Dog’s Age||Age in Human Years for Small-size breed||Age in Human Years for Medium-size breed||Age in Human Years for Large breed|
Table 5: Dog age chart by size
Dog age chart by teeth
You can also tell how old your dog is by looking at their teeth. Here is how:
|8 weeks||Has all puppy teeth|
|6 – 7 months||Has all adult teeth|
|1 – 2 years||Duller teeth & possible yellowing on the back teeth|
|3 – 5 years||Possible tartar on the teeth|
|5 – 10 years||More wear & infection signs on the teeth|
|10 – 15 years||Possible dense tartar build-up on teeth & might appear broken or missing|
Table 6: Dog age chart by teeth
How old are dogs in human years chart
Although you have been told that your dog’s 1 year equals your 7 years, the math is not as easy as they make it sound. That is because the rate of maturity in dogs is faster as compared to that of humans which explains why a 1 dog year equals to approx. 15 human years.
And because dog breed and size are factors affecting ageing as well, it is why small dog breeds have a long lifespan compared to large dog breeds. They also tend to mature faster than large dog breeds. Check out the chart below:
|Age of Dog||Age in Human Years for Small Dog Breed||Age in Human Years for Medium Dog Breed||Age in Human Years for Large Dog Breed|
Table 7: Dog age chart in human years
Dog age conversion chart
Do you wish to know how old your canine buddy would be in human years? The dog is man’s best friend so they say and knowing how they age helps maintain them better. If you are tired of the assumptions, use the AKC dog age conversion chart below:
AKC dog age chart
Here is the dog age chart from the American Kennel Club (AKC):
|Dog Age||Age in Human Years for Small dog||Age in Human Years for Medium dog||Age in Human Years for Large dog||Age in Human Years for Giant dog|
Table 8: AKC dog age chart
Hills dog age chart
Here is Hills dog age chart to help you determine the true age of your canine friend:
|Dog’s Age||Weight in Kgs (0 – 10) – small dogs||Weight in Kgs(10 – 25) -medium dogs||Weight in Kgs(25 – 40) large dogs||Weight in Kgs – Over 40 giant dogs|
Table 9: Hills dog age chart
How to calculate my dog’s age
Here is a methodology for calculating your dog’s age whether it is a small, medium, or large dog breed that has a weight of below 100 lbs. Below is a simplified formula – [human_age = 16ln(dog_age) + 31]. To calculate your dog’s age, remember these principles:
- 1st dog year equals 15 human years
- 2nd dog year equals approx. 9 human years
- Extra years equals approx. 4 – 5 human years
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Hi there! My name is Ben Domb, an owner of two pets and I am one of the co-founders of OurPets HQ. I have several years of experience as a pet care professional in the New England region having spent time in various roles including a stint at a veterinary hospital in Upstate New York, Syracuse area. I am a certified pet care professional and mostly spend my time researching pet nutrition and sharing my thoughts in various blogs and columns. With quarantine and COVID restrictions, I have been spending a lot of time a lot with my dogs and cat and loving it! I also run a small consulting business providing advice to parents on pet nutrition, and especially safe homemade options to try. You can reach me at email@example.com