Dog Years to Human Years


The Beagle

The Average Lifespan of a Dog

Working out dog years to human years for your pooch depends on his expected lifespan, which varies from breed to breed, and can be lengthened. More about that later, but for now, let’s assume you don’t know your dog’s breed and you just want a rough idea of dog years to human years.

Dog’s mature more quickly than humans in the first year of their life, so the first year of your dog’s life (in human years) is equal to 15 dog years. So if you have a one-year-old pooch, he will be a 15-year-old teenager to other dogs.

Dog Years Calculator

  • The average lifespan of a dog is 11.5. This is the average of all breeds put together.
  • The average lifespan of a human is 78.
  • That gives us 6.7 dog years to human years (round it up to 7 if you want to simplify the math).

In other words, if your dog is 5 years old (in human years) he is almost 35 years old in dog years. 

Dog Years to Human Years
Dogs mature more quickly than humans, so if you have a one-year-old pooch, he will be a 15-year-old teenager to other dogs.

How Long Do Dogs Live? 

The average lifespan of a dog varies from breed to breed, with the smallest breeds living longer than the large breeds. For example, the Chihuahua lifespan is around 16 while the Great Dane lifespan is only around 9 years. But the average lifespan of a dog can be lengthened.

The Chihuahua lifespan
The Chihuahua lifespan is around 16 years.

Average Lifespan of a Dog By Breed

Small Dogs

Chihuahua15 - 16
Chinese Crested15 - 16
Pomeranian14 - 17
Smooth and Wire Fox Terrier13 - 15
English Toy Spaniel13 - 15
Rat Terrier13 - 15
Yorkshire Terrier12 - 15
Russell Terrier12 - 14
Lakeland Terrier12 - 14
Manchester Terrier12 - 14

Medium Size Dogs

Cocker Spaniel13 to 15
Welsh Springer Spaniel13 to 15
Australian Shepherd12 to 15
Poodle12 to 15
Whippet12 to 15
Chinese Shar-Pei12 to 14
Puli10 to 15
Chow Chow11 to 13
Curly-coated Retriever11 to 13
French Bulldog11 to 13
Bulldog10 to 12
Boxer10 to 12


Large Dogs

Belgian Malinois14 to 16
Irish Setter12 to 14
Akita11 to 15
Anatolian Shepherd11 to 13
Newfoundland10 to 12
Giant Schnauzer10 to 12
Rottweiler10 to 12
St. Bernard10 to 12
Scottish Deerhound10 to 12
Flat-coated Retriever10 to 12
Dogue De Bordeaux9 to 11
Irish Wolfhound8 to 10
Great Dane8 to 10
Bernese Mountain Dog7 to 10
Great Dane Lifespan
The average Great Dane lifespan is 8 to 10 years, but this can be extended with the right food and lifestyle.

Factors Affecting Dog Lifespan

Pet obesity is an epidemic across developing nations. This is alarming because research has shown that obese dogs live 2 years less than dogs at a healthy weight. Obesity increases the risk of many diseases that not only shorten your dog’s life, but diminishes the quality of his life, too.

Keeping your dog at a healthy weight reduces the risk of his developing weight-related diseases, improves his quality of life, and gives him a chance to live out his full life expectancy.

Trauma, cancer, congenital disease and infectious disease are other factors that can affect your dog’s lifespan. Cancer is the leading cause of death in large dog breeds, particularly Golden Retrievers, and studies are underway to discover why this is the case.


 Extend the average lifespan of your dog with our free WAGSTA walkies, weight and wellness tracker. Join the pack and create the optimal healthy lifestyle for your dog!

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