Dog Age Chart: Dog Years to Human Years

How Old is Your Dog?

March 23, 2021
Dog Labrador Retriever

How old is your dog in human years? We used to simply multiply a dog’s age by seven. However, this calculation isn’t so cut-and-dried. See our dog age calculator and chart to discover your dog’s age.

The Easy Calculation of Dog’s Age

The easy way to calculate a dog’s age is to take 1 dog year and multiple it by 7 years. This is based on an assumption that dogs live to about 10 and humans live to about 70, on average.

For example, a dog which is 5 years old is 35 “human years.” This isn’t a bad way to go from a health perspective because it helps us humans realize that our dogs aren’t the same as children.

As pets get older, they need extra care and attention. Small dogs are generally considered “senior” at seven years of age. Larger breeds are often senior when they are 5 to 6 years of age. 

Be aware of arthritis and related discomfort or irritability, weight control, sight and hearing issues, and any changes in behavior or activity which could indicate more serious issues.

Visit your vet for exams regularly; adjustments can be made to give your pets a more comfortable, longer, healthier life.

The More Accurate Calculation of Dog Years

Statistics from pet-insurance companies, breed-club surveys, and veterinary hospitals have helped us learn more about how dogs age.

Contrary to common belief, dogs do not age at a rate of 7 human years for each year in dog years. 

According to the American Veterinary Medical Association:

  • The first year of a medium-sized dog’s life is equal to approximately 15 years of a human’s life.
  • The second year of a dog’s life equals about nine years for a human.
  • And after that, every human year equals approximately four or five years for a dog.

In other words, the number of human years piles onto a dog’s life more quickly during the dog’s rapid growth to maturity. 

Dog Age Calculator: Dog Years to Human Years

If we think like a dog, here’s how a dog’s age compares to a human’s age! Note that this calculator is for a medium size breed of dog. Consult the chart below to see the differences between different size dogs (small, medium, large, giant). It should give you a good sense of where your dog is in the development/aging process.

Dog Years to Human Years Converter

Dog's AgeHuman Years
years years

Enter your dog's age (from 1 to 16) to get the human years equivalent. The calculation is made for a "medium" dog (21 to 50 pounds) using the AKC recommendation.

Dog Years to Human Years Chart

Age of Dog

(dog’s age according to the calendar)

Dog’s Age in Human Years

(dog’s age in equivalent human years, based on stage of breed size)

Small Medium Large Giant
1 year 15 15 15 12
2 years 24 24 24 22
3 28 28 28 31
4 32 32 32 38
5 36 36 36 45
6 40 42 45 49
7 44 47 50 56
8 48 51 55 64
9 52 56 61 71
10 56 60 66 79
11 60 65 72 86
12 64 69 77 93
13 68 74 82 100
14 72 78 88 107
15 76 83 93 114
16 80 87 99 121

Source: AKC, “How to Calculate Dog Years to Human Years

Related Articles

Have a cat? See our Cat Age Chart!

Is your dog starting to enter its elderly years? Get some tips for caring for an old pup.

Also, check our home remedies for your pet’s arthritis.

Reader Comments

Leave a Comment

My Yorkie

I've had my dog for seven years. How old would be he in human yrs?

One Add One

Two Three Four Five Six Seven Eight Nine Ten Eleven Twelve



Attention dog age

Your Yorkie would be 72 years old in human life according to the chart

My dog was born January 1,

My dog was born January 1, 2021 I didn’t get him until February 11, 2021. I was told he was 4 weeks old. But when I took him to the vet they told me he was to big for his age. He was already a fat/healthy puppy when I got him he just got bigger. Can someone help me find out his age ? I never done this before


What about puppies who are like 3 or 4 or 5 months? Is that equivalent to like 2 - 7 year-olds?


My dog is 5 months. It said he was 36!


The Editors's picture

Emma, The calculator states “years.”  This refers to a 5-year-old dog, not a 5-month-old dog.

Age to 20

Why didn't the age go to 20? Small dogs go to that age right? But either than that thanks!


I just wanna to know how meany years left

100 pound Labrador

How old in human years would my 100 pound Yellow Lab be?
Thank you for this updated dog years/human years conversion information.


I love everything about the company it takes me back to when I was 5years old so cool when you walk in seeing lots of different kinds random prices

What about if you dog is 20?!

I do t understand why the chart didn't go to 20. Most small dogs live to the age if I'm correct?

How old is a 5 week old Rottweiler puppy in human years?

My dog is a 5 week old Rottweiler, how old is she in dog years?!?

Miniature Schnauzer Age

hello my dog is 18 and 3 months. 18 is not on your calculator can you help me with an age ty

Chihuahua dog

I've had my chihuahua dog for 19 years I got her a few months before my oldest granddaughter was born and she will be 19 in July how old would she be


My dog is 9 months old how old is she in dog years

dogs age

my dogs age is 14 and he is a yorkie. How old is he in human's age?

Yorkie age

The Editors's picture

According to the above tool, that would be about 78 years of age in human years. However, this calculator is for a medium dog. For a small dog, such as a Yorkshire Terrier, calculations can be a bit different. Several sources say that a 14-year-old yorkie would be about 72 years old in human terms.

Dogs Date of birth

I’m dogs date of birth 06/03/2012 How old


My 2kg Chihuahua is 18 years old. How old is she in human age?


My Mom's dachshund is 17 years old, probably going to live longer, he loves to eat. Why does this chart stop at 16 years old?

I must be missing something...

My dog is 15 years old. the first two years would equate to 24 human years (15 + 9), according to this system. That leaves 13 years, each equal to about 5 human years (65). So add all this up and I get my dog is 89 human years old. Your calculator says 83. Of course, it's all approximate, but still - 6 years is a LOT different. So, what's the deal?

Dog Year Difference

The Editors's picture

For simplicity’s sake, we assume that each human year (past Year 2) is equal to either 4 or 5 “dog years” and alternate them accordingly. If you assume that every year equals only 5 dog years, you will end up with a few more years than our calculator.

Cat ages in human years

Ok you addressed dog do cat ages...

pet calculator

The Editors's picture

We are actually working on a cat calculator! You’re not the first person who has asked. Thanks! 


What would the calculation be for a heavier dog? I have Chow Chows and have all my life and Storm will turn 12 on Halloween this year (he was born in 2007) So what would the difference be for dogs that weigh between 55-75 pounds. Even though my boy is getting up there in years you would think he looks and acts like a pup, he is the first black Chow I have had and am so happy to say he doesn't have a grey hair anywhere and is still very active and HEALTHY!!! Even though there isn't a weight limit on my breeds standard, all my Chows have been between 55-75 pounds and have never had a weight problem with any of them at any time in their life spans. So am curious as to how the calculation may be tweaked to accommodate the heavier weight.


I was recently at the vet's office and saw a new and more accurate chart for aging your pets. It showed not only dog but cat ages as well. Something that I found very enlightening was that their equivalent human age depends on the size of the dog. We know that wolfhounds live a far shorter life than a Yorkie so it stands to reason that a 5 year old mini would be far younger in human years than a 5 year old giant breed.
I was 68 at the time and ironically it turned out that my 8 1/2 year old GSD and my 14 year old cats were the same age in human years. According to the chart above Willow, my shepherd, would only be 51. I wish that were so. Actually, I wish that I were only 51 too! LOL

dog age calendar

Is it the word "approximately" ("And after that, very human year equals approximately five years for a dog") that have the above calendar chart change from 4-6 years apart in the list? Doing the math, I figured my 12 year old dog was 74, but it says 69. In comparing to human years.. there is quite a difference between 69 and 74.

This was informative. I've

This was informative. I've never been able to find how to calculate a cats age. I had an old man until he was 24. Now I have my other one who is 22.