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Dog Years To Human Years Conversion






One year in the life of a normal dog is comparable to seven years in human life…or is it? Don’t panic if this is how you have been estimating your dog’s age. You are not the only one. The truth is, though, that this strategy is not perfectly true.

The “one dog year is equivalent to seven human years” approach was most likely designed to merely demonstrate that canines age more quickly than humans. Scientists and academics have now discovered a more accurate way of converting a dog’s age to human years.

So, let’s delve into it.

A Simple Way to Calculate Your Dog Years

Dog Ages

To get a dog’s age, simply multiply one dog year by seven years. This is built on the presumption that canines live to be around ten years old and people live to be around 70.

A 6-year-old dog, for instance, is 42 “human years” old. From a health standpoint, this is a good approach since it helps us people recognize that our dogs are not the same as kids.

As pets age, they require more attention and care. At seven years of age, most little dogs are usually termed “senior.” As bigger breeds reach the age of 5 or 6, they are considered senior.

Be mindful of any shifts in activity or behavior that might suggest more serious concerns, such as arthritis and accompanying discomfort or irritation, weight maintenance, vision and hearing problems, and other shifts in behavior or activity that might suggest more severe problems.

Frequently see your veterinarian for checkups; modifications could also be made to make your pets’ lives more pleasant, longer, and healthier.

The More Precise Calculation of Your Dog Years

Data from pet-insurance firms, breed-club surveys, and medical institutions have helped us understand how dog’s age more precisely.

Dogs do not actually age at the rate of seven human years per year in dog years, which is in contrast to widespread perception.

As per the American Veterinary Medical Association, the first year of a medium-sized dog is roughly 15 years.

The second year of a dog is roughly nine years in human years.

Then after, a dog’s year is roughly four or five years long for each and every human year.

To put it another way, during a dog’s fast development to maturity, the number of human years mounts up faster.

Calculator For Converting Dog Years to Human Years

Here is how a dog’s age is comparable to a human’s age. Please keep in mind that this online calculator is for a medium-sized dog breed. To observe the variations between different sizes of dogs, look at the chart down below (small, medium, large, and giant). It should provide you with an awesome idea of where your dog is in terms of growth and age.

Look at this dog years to human years calculator and simply input your dog age to get the comparable human years.

Comparison between Dog and Human Years Chart

Although almost all pet parents have been converting their dog’s dog years to human years for quite some time, the procedure has no foundation in reality, and the human years to dog years conversion is primarily just for fun. Use the dog years converter to determine how old a tiny, small, medium, large, or gigantic dog breed is in human years.

Japanese Chin
Breeds  Dog age Equivalent human age


Japanese Chin


Manchester Terrier

Toy Fox Terrier


Yorkshire Terrier

0 – 9  months Younger than 15 years old
10 – 11 months Younger than 15 years old
1 15
2 23
3 28
4 31
5 35
6 38
7 42
8 45
9 49
10 52
11 56
12 59
13 63
14 66
15 70
16 74

Dog years to human years conversion chart for toy size dogs (up to 10 lbs.)

Boston Terrier
Breeds  Dog age Equivalent human age
Australian Terrier

Lhasa Apso

Bichon Frise


Boston Terrier

Border Terrier

Cairn Terrier

Chinese Crested

English Toy Spaniel

Norwich Terrier

Brussels Griffon

Miniature Pinscher



Cavalier King Charles Spaniel

Lakeland Terrier



Silky Terrier

Miniature Schnauzer

Dandie Dinmont Terrier

Tibetan Spaniel



French Bulldog

Scottish Terrier


Skye Terrier

Italian Greyhound

Norfolk Terrier

West Highland White Terrier

Shih Tzu

0 – 9  months Younger than 15 years old
10 – 11 months Younger than 15 years old
1 15
2 23
3 28
4 32
5 36
6 40
7 44
8 48
9 52
10 56
11 60
12 64
13 68
14 72
15 76
16 80
17 84
18 88
19 92
20 96

Dog years to human years conversion chart for small size dogs (up to 20 lbs.)

Shiba Inu
Breeds  Dog age Equivalent human age
Airedale Terrier

Shiba Inu

Australian Cattle Dog

American Eskimo Dog


Canaan Dog

American Foxhound




Bearded Collie

Border Collie

American Water Spaniel

Irish Terrier

Bull Terrier

Finnish Spitz

English Cocker Spaniel

Cardigan Welsh Corgi


Manchester Terrier

Bedlington Terrier

English Springer Spaniel

Field Spaniel


Pembroke Welsh Corgi

Kerry Blue Terrier

Miniature Bull Terrier

Tibetan Terrier

Petit Basset Griffon Vendeen

Standard Schnauzer


Shetland Sheepdog


Soft Coated Wheaten Terrier

Sussex Spaniel

Welsh Terrier

Staffordshire Bull Terrier

Wire Fox Terrier

Chinese Shar-Pei

0 – 9  months Younger than 15 years old
10 – 11 months Younger than 15 years old
1 15
2 24
3 29
4 34
5 38
6 42
7 47
8 51
9 56
10 60
11 65
12 69
13 74
14 78
15 83
16 87

Dog years to human years conversion chart for medium size dogs (up to 50 lbs.)

Australian Shepherd
Breeds  Dog age Equivalent human age

Airedale Terrier

American Staffordshire Terrier


Afghan Hound

Australian Shepherd

Basset Hound

Bernese Mountain Dog

Bearded Collie

Belgian Sheepdog

Spinone Italiano

Belgian Tervuren


Alaskan Malamute


Chow Chow


Bouvier des Flandres


Ibizan Hound


German Shepherd Dog


Clumber Spaniel

Pharaoh Hound


Flat-Coated Retriever

Curly-Coated Retriever

Belgian Malinois


German Wirehaired Pointer

English Foxhound


English Setter

Black and Tan Coonhound

Portuguese Water Dog


German Shorthaired Pointer

Golden Retriever

Norwegian Elkhound

Gordon Setter

Rhodesian Ridgeback

Chesapeake Bay Retriever



Labrador Retriever

Irish Setter


Irish Water Spaniel



Siberian Husky

Old English Sheepdog

Wirehaired Pointing Griffon


0 – 9  months Younger than 15 years old
10 – 11 months Younger than 15 years old
1 15
2 23
3 28
4 31
5 35
6 38
7 42
8 45
9 49
10 52
11 55
12 59
13 63
14 66
15 70
16 74
17 78

Dog years to human years conversion chart for large size dogs (50+ lbs.)

Breeds  Dog age Equivalent human age
Anatolian Shepherd Dog

Scottish Deerhound



Giant Schnauzer

Great Pyrenees


Greater Swiss Mountain Dog


Irish Wolfhound

Great Dane


Saint Bernard

0 – 9  months Younger than 15 years old
10 – 11 months Younger than 15 years old
1 15
2 23
3 28
4 31
5 35
6 38
7 42
8 45
9 49
10 52
11 56
12 59
13 63

Dog years to human years conversion chart for giant size dogs (100+ lbs.)

How Do Your Dogs Age?

Dog Years Age

Apart from the enormous group, tiny, medium, and big dog’s age similarly until they reach around the age of six, as seen in the dog age chart above. After that, as compared to their smaller and medium-sized equivalents, bigger canines age considerably faster. A little dog, such as a Dachshund, will be around six human years younger than a big breed, such as an Airedale Terrier, by the age of seven. Why is this the case?

Scientists are still puzzled as to why smaller canines mature more slowly and live longer than bigger dogs. Some studies believe it is because bigger dogs are more susceptible to age-related ailments, as per the American Kennel Club. Similarly, bigger dogs mature faster from puppy to maturity, increasing the risk of aberrant cell proliferation, cancer, and other disorders. Because of this, the “one dog year is equal to seven human years” formula is not entirely correct.

While the current method I have presented is more precise, it is still hard to come up with a universal formula for how dogs age because it depends not only on their size but also on their genetics and breed.

Why Is It Vital To Know My Dog’s Age?

Estimating your dog’s age in human years using a dog years to human years age conversion chart is an interesting and informative method to discover more about them. It is also significant for other reasons. Knowing your dog’s age and how they are growing, for example, allows you to appropriately care for them as well as help them live the best quality of life possible.

Please remember that if you have a bigger dog, you should start looking for symptoms of aging around the age of five or six, but smaller dogs may not show any signs till they are around seven or eight years old. In any case, as your dog gets older, you will also want to pay special attention to their demeanor, eating habits, and activity level.

Generally speaking, a balanced diet and weight, constant physical activity and intellectual stimulation, and frequent vet visits all contribute to your dog’s longevity. You should also think about getting pet health insurance to include any unforeseen accidents or diseases. After all, regardless of how old your dog is, they all deserve the best care and attention possible.

Life Expectancy of Different Dog Breeds

Animals that are bigger tend to live longer than those that are smaller (in most cases). Consider this. Humans outlive cats, rats, and flies. But why is the same not actually true for animals inside their own species?

A 120-pound individual will probably live longer than a 240-pound one. They live longer due to the greater health risks associated with a 240-pound human.

How can a Great Dane and a Chihuahua be compared in terms of life expectancy? Their anatomical structures are vastly varied, as are their life expectancies. Would there be an average age for a dog depending on the breed or other criteria besides size? Absolutely yes. Let me delve deeper into this topic.

What are several of the most typical indications of aging in dogs?

As a result, looking at physical and behavioral indicators to identify your dog’s age can be beneficial. Teeth, for instance, could be an excellent predictor of your dog’s age. All of the permanent teeth of your dog should be in by seven months. And by 1-2 years, they tend to be dimmer and may be yellowing. Then by 5-10 years, they will start to show wear and probably signs of disease, according to PetMD.

Other signs of your dog’s age, particularly as they approach senior status, include:

  • Graying hair
  • Foggy eyes, poor vision
  • Hearing difficulties
  • Arthritis, stiff joints, and muscles
  • Decreased level of activity
  • Increased worry, confusion, house mishaps, anger, other behavioral shifts, etc.

If you are still not sure, you can always ask your vet for exact estimation of your dog’s age. To determine their age, your vet will analyze features such as teeth, body form, fur or hair, and eyes, among others.

Dog Breed Life Expectancy Chart

Dog Breed

The chart down below shows dog life expectancy during the last decade, organized by the most common certified breeds.

Dog Breeds Average Life Expectancy
Bernese Mountain Dogs 6 – 8 years
Great Dane 6 – 8 years
French Bulldog 8 – 10 years
Bulldog 8 – 12 years
Rottweiler  9 years
Boxer  9 – 10 years
Cavalier King Charles Spaniel 9 – 14 years
Doberman Pinscher 10 – 13 years
Labrador Retriever 11 years
German Shepherd 11 years
Golden Retriever 11 years
Poodles  12 years
Miniature Schnauzer 12 – 14 years
German Shorthaired Pointer 12 – 14 years
Beagle  12 – 15 years
Pembroke Welsh Corgi 12 – 15 years
Siberian Husky 12 – 15 years
Australian Shepherd 12 – 18 years
Yorkshire Terrier 13 Years (probably up to 20 years)
Dachshund  13 – 15 years

10 Dogs That Have a Short Life Expectancy

The majority of the dogs in this graph are bigger breeds. As previously said, bigger dogs tend to have a shorter life expectancy than smaller dogs. Big breeds, according to some, age more quickly. A Great Dane, for instance, can gain up to 100 pounds between birth and its first birthday, but a Shih Tzu can weigh around 15 pounds in its lifetime. The table down below lists ten canines with short life expectancy.

Dog Breeds Average Life Expectancy 
French Mastiff 5 – 8 years
Burmese Mountain Dog 6 – 8 years
Great Dane 6 – 8 years
Irish Wolfhound 6 – 10 years
Neapolitan Mastiff 7 – 9 years
Leonberger 8 – 9 years
Scottish Deerhound 8 – 10 years
Saint Bernard 8 – 10 years
Newfoundland 8 – 10 years
Bloodhound  9 – 11 years

Which Dog Breed Has The Longest Lifespan?

Chihuahuas are known for having the longest lifetime of any dog breed. In particular, they live for 15-20 years on average and are one of the tiniest dog breeds. Megabyte, the world’s oldest Chihuahua, passed away at the age of 20 years, 8 months, and 25 days.

Besides, the Australian Cattle Dog does have one of the longest lifespans of any breed. Australian Cattle Dogs have been known to live to be over 20 years old. In truth, the world’s longest-living dog is Bluey, an Australian Cattle Dog that lived for 29 years and 150 days.

Frequently Asked Questions

Before heading to the conclusion, let’s take a look at these six most popularly asked questions about dog years to human years calculator.

What is the equivalent of a human year in dog years?

You and your dog mature at drastically varying rates owing to his or her relatively shorter life expectancy. The degree to which your dog differs is determined by his or her age and weight. In an individual living year, a 2-year-old Pekingese can age four years, and a 9-year-old Great Dane can age 9.

What do you mean when you say “dog years”?

A human calendar year has 365 days in it. The amount of time that passes throughout that period varies depending on your dog’s life expectancy.

In dog years, how long is a year?

In the sense that every breed has an average weight variation, it varies on the breed. For instance, a 2-year-old, 20-pound Dachshund might age as little as four years as its human counterpart in a single calendar year, yet a 130-pound Newfoundland might age as much as nine years.

What is my mixed breed’s comparable human age?

The abovementioned weight categories are the best approach to measure age for inbreds, mutts, Heinz 57s, or anything else you want to call your mixed dog breed. Small dogs, on average, age more slowly and live up to 16 years longer than gigantic dogs, who are almost the same age at 10 to 12 years.

Is a dog’s year equal to a human year?

One dog year is equal to seven years, according to the renowned “rule of the paw.”

How do I figure out how old my dog is in human years?

The first year of a dog is equivalent to 15 human years.

The second year of a dog is roughly equivalent to 9 human years.

Each extra year is roughly equivalent to 4 or 5 human years.


Even while the popular “one dog year is equal to seven human years” technique has been around for a long time, it is not really correct. We now have a more precise way of estimating the age of our dog, thanks to new research.

While arithmetic is a little bit more complicated than a simple 1:7 ratio, you could always use my dog years to human years table rapidly and effortlessly figure out how old your dog is.

Steven Ta
Steven Ta
I am a professional photographer and shoe-lover. With a deep-rooted passion for all things footwear and years of hands-on experience, I am your go-to guide in the awesome world of shoes
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