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Dog Age Chart – How Old Is My Dog

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 DogSmall-Size DogsMedium-Size DogsLarge-size dogs
Age of DogAge in Human YearsAge in Human YearsAge in Human Years
1 year151515
2242424
3282828
4323232
5363636
6404245
7444750
8485155
9525661
10566066
11606572
12646977
13687482
14727588
15768393
168087120

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 Age1 – 20 lbs.20 – 50 lbs.50 – 90 lbs.Above 90 lbs.
17789
213141618
320212426
426273134
533343841
640424549
744715056
848515564
952566171
1056606678
1160687286
1264697793
13687482101
14727888108
15768393115
16808799123

Table 2: Dog age chart based on weight

Dog age chart in months

Dog AgeHuman Age
2 months1 year 2 months
6 months5 years
8 months9 years
1 year15 years
2 years24 years
3 years28 years
4 years32 years
7 years37 years
8 years47 years
9 years52 years
10 years57 years
11 years67 years
12 years72 years
13 years77 years
14 years82 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 DogAge in Human Years for small dogsAge in Human Years for medium dogsAge in Human Years for large-size dogsAge in Human Years for giant dogs
115151512
224242422
328282831
432323238
536363645
640424549
744475056
848515564
952566171
1056606679
1160657286
1264697793
13587482100
14727888107
15768393114
16808799121

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 YearsHuman years
115
224
328
432
536
645
750
855
961
1066
1172
1277
1382

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 yearsHuman years
224
328
432
536
640
744
848
952
1056
1160
1264
1368
1472
1576
1680
1784

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 YearsHuman years
17
213
320
426
533
640
744
848
952
1056
1160
1264
1368
1472
1576
1680
1784
1888
1992
2096

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 HuskyHuman Years
115
224
328
436
542
647
751
856
960
1065
1169
1274
1378
1483
1587

Golden Retriever

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 YearsHuman years
17
214
321
427
534
642
747
851
956
1060
1168
1269

Dog age chart by size

Dog’s AgeAge in Human Years for Small-size breedAge in Human Years for Medium-size breedAge in Human Years for Large breed
1151515
2242424
3282828
4323232
5363636
6404245
7444750
8485155
9525661
10566066
11606572
12646977
13687482
14727888
15768393
168087120

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:

Dog ageTeeth
8 weeksHas all puppy teeth
6 – 7 monthsHas all adult teeth
1 – 2 yearsDuller teeth & possible yellowing on the back teeth
3 – 5 yearsPossible tartar on the teeth
5 – 10 yearsMore wear & infection signs on the teeth
10 – 15 yearsPossible 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 DogAge in Human Years for Small Dog BreedAge in Human Years for Medium Dog BreedAge in Human Years for Large Dog Breed
1 year151515
2242424
3282828
4323232
5363636
6404245
7444750
8485155
9525661
10566066
11606572
12646977
13687482
14727588
15768393
168087120

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 dogAge in Human Years for Medium dogAge in Human Years for Large dogAge in Human Years for Giant dog
115151512
224242422
328282831
432323238
536363645
640424549
744475056
848515564
952566171
1056606679
1160657286
1264697793
13587482100
14727888107
15768393114
16808799121

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 AgeWeight in Kgs (0 – 10) – small dogsWeight in Kgs(10 – 25) -medium dogsWeight in Kgs(25 – 40) large dogsWeight in KgsOver 40 giant dogs
17789
213141618
320212426
426273134
535343841
640424549
744475056
848515564
952566171
1056606678
1160657286
1264697793
13687482101
14727888108
15768393115
16808799123
178492104131
188896115139
1992101120
2096105126
21100109130
22104113
23108117
24112120
25116124

Table 9: Hills dog age chart

FAQs

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