Dog age Calculator

If your dog were a human, how old would they be? Use this dog age calculator to find out! Select your dog’s breed and enter its age, and the tool will calculate its equivalent human age.



Created by Helen Stark

Helen Stark
Helen Stark

Student of Harvard university, she loves to observe new things about society, she studies Wikipedia more and learns about quantum physics on the internet. She loves dancing and singing songs.

Reviewed by Nick Walker

Nick Walker
Nick Walker

Done PHD of nuclear physics from the University of Pennsylvania. He is always seeking ways to explain science in easy terms. Moreover, he loves coffee & its beans more than his girlfriend (not at all).

Our dog age calculator helps pet owners estimate their dog's age in human years based on the dog’s actual age. It provides a simplified way to understand and relate their dog's age more closely to equivalence human years by using factors like dog size, age, and breed.

How Old Is My Dog in Human Years?

Figuring out how old your dog is in human years can be a bit tricky,  it depends on a few things like their size, breed, and age. There's a rule that says one dog year equals seven human years, but it's not that accurate.

For a more accurate estimate of your dog’s age in human years, people usually turn to this dog age calculator. This calculator considers various factors to figure out your dog's age in human years.

How to Use the Dog Age Calculator?

Select the Option and Add Values: choose the version you prefer for calculation:

  • Simple Version (based on dog’s size and age)
  • Advanced Version (based on dog’s age and breed)

Start Calculations:  Click Calculate

Results: You will get the following results about your dog:

  • Dog’s age in human years
  • Breed group
  • Height
  • Weight
  • Life span
  • Temperament and more facts about your dog’s age

Related: Interested in calculating your cat's age equivalent to human years? Tap Cat age calculator

Do Dogs Really Age Seven Times Faster Than Human?

The idea that dogs age seven times faster than humans is a common misconception. It comes from an old rule of thumb known as the 7:1 rule. It might have come from the fact that people lived around 70 years, while dogs usually lived to about 10.

One veterinarian, William Fortney believes it might have been a smart tactic to encourage pet owners to take care of their furry companions by visiting the vet regularly. It was like a gentle push to remind people to keep an eye on their pet's health by visiting the vet at least once a year.

So, that idea turned out to be a myth because that way of calculating isn't very accurate and doesn't truly represent the way dogs age.

How Do I Calculate My Dog’s Age in Human Years?

Scientists from the University of California found a new way to figure out your dog's age in human years! They checked out some special things in DNA to understand how dogs and humans age. Then they came up with a formula, this formula makes it easy to calculate your dog’s age in human years.

Dog Age Formula:

human_age ≈ 16 * ln(dog_age) + 31

In this formula,

  • 16: A constant number used in the formula to adjust dog and human years
  • ln: Stands for the natural logarithm
  • 31: Another constant value that is used to adjust results to the realistic human age range

With the help of this formula, you can calculate your dog’s age easily.

Dog Years vs Human Years

You are familiar with how we measure our age in years, but when it comes to measuring a dog’s age is a different story compared to human years. Although there is no perfect dog age calculator, the American Veterinary Medical Association has established general guidelines to assist you in determining your dog's age in human years:

When dogs are young, they age more rapidly than humans in terms of physical development and maturity. For instance, a one-year-old dog can reach adulthood in terms of physical growth which might equate to about 15 human years. However, this aging process isn't linear or fixed.

As dogs get older, the rate of aging slows down. Larger dogs tend to age more quickly in their early years but then might age more slowly compared to smaller breeds as they reach their senior years. Factors like breed, size, genetics, and overall health also influence the aging process.

So, while comparing dog years to human years is a way to understand how dogs age, it's not a perfect match. It's more like a rough estimate that helps us get an idea of our furry friends' ages compared to ours.

How Long Dogs Usually Live by Size

The table below provides a clear overview of typical dog lifespans based on their sizes.

Size Average Lifespan
Small 12 - 16 years
Medium 10 - 14 years
Large 8 - 12 years
Giant 6 - 10 years

How Pet Owners Can Help Their Dogs Live Long

Making sure your beloved dog lives a long and healthy life is easier than you might think! Here are some simple tips to help your furry companion grow:

Balanced Nutrition: Feed your dog a nutritious diet that meets their specific needs. Consult your vet for guidance on the best food choices.

Regular Exercise: Daily walks and playtime are great ways to keep your dog active and make sure they stay fit and maintain a healthy weight.

Routine Vet Check-ups: Consistent vet check-ups are crucial as they help identify any potential health problems early and keep your dog healthy.

Vaccinations and Preventive Care: Stay up to date with vaccinations and treatments to protect your dog from diseases and parasites.

Love and Attention: Shower your furry partner with love and attention. A happy dog is a healthy dog!

By following these simple steps and giving your dog the care they deserve, you'll contribute to their longevity and happiness.

Dog Age Chart:

Dog's Age Equivalent Human Years








1 15 15 15 15
2 24 24 24 24
3 28 28 28 28
4 32 32 32 32
5 36 36 36 36
6 40 42 45 49
7 44 47 50 56
8 48 51 55 64
9 52 56 61 71
10 56 60 66 78
11 60 65 72 86
12 64 69 77 93
13 68 74 82 101
14 72 78 88 108
15 76 83 93 115
16 80 87 99 122

Why is understanding my dog’s age important?

Knowing your dog's age is important because it helps you take better care of them! Just like humans, dogs have different needs as they get older. Understanding their age helps you in:

  • Right Nutrition
  • Exercise According to their Energy Level
  • Better Healthcare 
  • Build a Stronger Bond
  • Adjust Activities
  • Predict Health Changes
  • Quality of Life

What are common signs of aging in dogs?

As our dogs grow older, they exhibit certain signs that indicate the natural aging process.  Let's explore the common signals that let us know our furry friends are getting a bit older.

  • Gray Hair
  • Reduced Energy
  • Slower Movement
  • Joint Stiffness
  • Poor Eyesight
  • Changes in Sleep Patterns
  • Reduced Hearing or Vision
  • Dental Issues
  • Changes in Appetite
  • Weight Gain or Loss
  • Behavioral Changes