What Your Dog’s Age In Human Years?

Sep 26, 2023 | Dogs & Puppies | 2 comments

Calculating your dog’s age compared to human years is not as simple as multiplying by seven, contrary to popular belief. Instead, the conversion is more nuanced and hinges on breed, size, and overall wellness.

The Tale of Seven Years

The old saying that each dog year is the same as seven human years isn’t quite right. This rule overlooks that dogs grow up faster in their early years than humans. Small dogs usually have longer lifespans than larger dogs, so the 7-year rule gets even more confusing.

A Better Way of Calculating

Researchers have found a more precise method to determine a dog’s age in human years. This new way considers their faster maturation rate and size in their early years.

Small Dog Breed

For small dog breeds, the following table shows the approximate equivalent age in human years for different dog ages:

Dog Age (in Dog Years) Equivalent Age in Human Years
1 15
2 24
3 28-32
4 32-36
5 36-40
6 40-44
7 44-48
8 48-52
9 52-56
10 56-60
11 60-64
12 64-68
13 68-72
14 72-76
15 76-80

Medium Dog Breeds

For medium-sized dog breeds, the following table provides an estimate of their equivalent age in human years:

Dog Age (in Dog Years) Equivalent Age in Human Years
1 12
2 22
3 28-30
4 34-38
5 40-46
6 49-54
7 56-60
8 64-68
9 68-72
10 72-76
11 77-82
12 82-88
13 88-94
14 93-100
15 99-106

Large Dog Breeds

Large dog breeds age differently than smaller ones. Here’s a table showing their approximate equivalent age in human years:

Dog Age (in Dog Years) Equivalent Age in Human Years
1 10
2 20
3 25-28
4 30-32
5 35-40
6 42-49
7 49-56
8 56-64
9 64-73
10 73-82
11 82-93
12 93-104
13 104-115
14 115-126
15 126-137


Dogs grow up fast in their first year of life. When dogs hit the one-year mark, they’re about the same as a 15-year-old human. Their second year is like adding another nine human years, so a two-year-old dog is around 24 human years.

Adult Years

After the initial two years, how fast a dog ages depends on its size and breed. Small breeds, which typically outlive large breeds, age slower. For these small pups, each year after the first two might be about four to five human years.

For larger dogs, each year after the first two might be closer to six to seven human years since they tend to age quickly.

The Impact of Breed and Genetics

The breed and genetics of a dog significantly affect their lifespan and how fast they age. For instance, tiny dogs like Chihuahuas can often live to their late teens or early twenties, while big breeds like Great Danes may only reach seven or eight years old.

New studies show that, like humans, a dog’s DNA changes over time, but it happens quickly in dogs. This knowledge helps us better understand how dog years relate to human years and could refine these calculations in the future.

Final Thoughts

Remember, these are just approximations, and many factors can influence aging. These factors include diet, exercise, living conditions, and regular vet care. Routine vet check-ups are vital for keeping tabs on your dog’s health and ensuring they live a long, healthy life.

Lastly, don’t forget that whether we’re talking dog years or human years, the important thing is to enjoy your time with your pet. After all, life is short, no matter how you count it.


American paws divider



Why does my puppy age so quickly in the first year?

Dogs age quickly in their first year because they reach sexual maturity much faster than humans. Within their first year, they physically develop to a stage comparable to a human teenager. It’s a biological adaptation for survival in the wild that remains even in our domesticated pets.

Why do smaller dogs live longer than larger dogs?

Generally, the larger the dog, the shorter its lifespan. Scientists believe this is because larger dogs grow from puppies to adults at a much faster pace than smaller dogs, which can lead to earlier occurrences of age-related diseases.

Are there exceptions to the general rules of dog aging?

Yes, there are exceptions. Some larger dogs might live longer than expected, while some smaller dogs may have shorter lifespans. It can depend on many factors, including breed-specific health issues, individual dogs’ health, diet, exercise, and veterinary care.

How does a dog’s diet affect its aging process?

Like humans, a balanced, nutritious diet can contribute to a longer, healthier dog life. Obesity can lead to various health problems and potentially shorten a dog’s life, so managing portion sizes and ensuring your dog gets a balanced diet is important.

Can regular exercise extend my dog’s life?

Regular exercise can certainly help keep your dog healthy, which might contribute to a longer life. Exercise helps maintain a healthy weight and good cardiovascular health, both important for longevity.

How can I keep track of my dog’s health as they age?

Regular check-ups with your vet are important as they can help detect any health problems early. Keeping an eye on changes in your dog’s behavior, appetite, weight, or physical condition can also help you catch any potential health issues.

Is my dog’s behavior likely to change as they age?

Just like humans, dogs can experience changes in behavior as they age. They may become less active, shift their sleep patterns, and experience cognitive changes. Regular vet check-ups can help manage these changes and ensure your dog’s comfort as they age.



  1. DogDadMax

    Wow, the dog age conversion is fascinating. My buddy, Max (yes, I know, real original), is 5, but I had no idea he’s like 35 in human years! Makes me appreciate our time together even more. 🐾🕰️

  2. AgeCalculatorAlex

    the dog age calculation is eye-opening! My Labrador is 6, but in human years, he’s hitting middle age. Anyone else surprised by their dog’s “real” age?

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