Dog Age Chart: Dog Years to Human Years

Dog Years: How Old is Your Dog?

October 7, 2019
Dog Labrador Retriever

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

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.

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 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, very human year equals approximately 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! There are differences between a dog’s size (small, medium, large) and a dog’s breed, but this 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

Dog Years

(dog’s age according to the calendar)

Human Years

(dog’s age in equivalent human years, based on stage of development/aging)

1 year 15
2 years 24
3 28
4 32
5 36
6 42
7 47
8 51
9 56
10 60
11 65
12 69
13 74
14 78
15 83
16 87

Learn More

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

What about cats? How do they

What about cats? How do they age?

You have the terminology wrong

I don't understand why you have dog years and human years the way you do. A human year equates one year. When we use the terminology of dog year it implies the equivalent in dog years, not "human years" as you state.

dog years

We understand your point, and it can be confusing. “Dog Years” in this case is the actual dog’s age, such as would be on a veterinarian chart (tied into Gregorian calendar years). “Human Years” is the equivalent age in human years that matches the stage in development of the dog at the specified dog age (the one on the veterinarian chart). So, for example, because a dog ages faster than a human, a 1-year-old dog according to the Gregorian calendar (dog years) would be the equivalent in age and development of a 15-year-old human (human years). We’ll think about the headings and description to try to make this clearer. Thank you for your feedback! 


I have a adorable new puppy her name is Bubbles. I love her so much. She is 2.5 months human years but I cant work out how old she is in dog years. Please help me. Thanks.

puppy age

Unfortunately, our chart does not cover dogs that are less than 6 months in age. Puppies mature rapidly in their first months of development; just how much will depend on the dog breed (size) and other factors. For a very rough estimate, you might use the formula: 6 months dog age/10 years human age = 2.5 months dog age/x years human age, which yields  a little over 4 years in human terms. Hope this helps–and congratulations on your new puppy!


Does the dog age chart apply to CATS too??


No it doesn't, but I sure wish they'd publish a chart that does.

Cat Chart

We have a shelter cat who was fully grown when we got her. I've guessed that she was about 3 or 4 in 2010. A chart would be helpful for increased care (vet visits) and for taking care of her needs at home. It is frustrating when you can't give an accurate answer to the vet. Thank you.

cat ages

The Editors's picture

Traditionally, it was said that each year a cat lived was equivalent to having lived 7 human years (so, a cat 3 years old would be 21 years in human terms). However, this turns out to be incorrect. Cats mature faster during their first 2 years. Actually, looking at the dog chart above, it is very similar. The first 2 years of a cat’s life, it is estimated that they have matured to about 24 or 25 years of a human’s life. Then from there on, the cat develops more slowly, every year being the equivalent to about 4 years of a human. Maturity rate, aging, and lifespan of an individual cat will depend on environment, health, breed, etc., but this is a general guideline.

Dog age

I have a female rat terrier that is 17/79 1\2 years old. Very loyal and loving dog. My new puppy is 4mths old so she isn't quite 15 human years, my Res Boston Terrier is 8 dogs years & 52 human years. All are family dogs. Love them all.


I've also seen where a pup's first year was equivalent to 15 years old, and subsequent years equaled 7 years...

My American Pit Bull Lived to

My American Pit Bull Lived to be 15 or 16 years old and died from health problems


how do horses age?

horse ages

The age of a horse equivalent to human age will vary upon many factors, such as breed, etc. In general, though, it is thought that horses age about 6.5 years for each human year until age 4, when it is a young adult of about 20 in human years. After age 4, they age about 2.5 years for every human year.

My boys

Bruno made it to 48 or more....

Levi's currently 64....

Luv dawgies like they the only real true good in a bad bad world....

And dad mom too


And bye




I have two questions
1. If a dog is born 12-5 how old is she??
2. If a dog is born 2-10 how old is she?? Both of this year


Gingersnap was 13.5 yrs approx 110 in her years. She was a shelter dog mix of German shepherd, Chelsea collie, beagle, and husky.
Little on the heavy side about 110-125
One of the best dogs I had, smart, loyal, protective when need in her mind, loved kids, and would kill if you forced your way in the house with out a ok given. She was great miss her after 2001.

Our dog Lindsay lived to 98

Our dog Lindsay lived to 98 using this formula, not bad for a dog with only 3 legs. We miss you girl.

Like my dog throws up idk how

Like my dog throws up idk how long he is going to live how do u know when your dog going to die

Mia Harris-how do you know when your dog is going to die

I realize that it's been almost 2yrs since you posted that your dog was throwing up & you didn't know how much longer he was going to live...I hope you don't mind me asking, but were you ever able to get him to your Vet's office? Did he stop throwing up? If he has passed on, I am VERY sorry for your loss. I pray that he didn't suffer. Please forgive me if I open old wounds. I was merely trying to educate myself. As I too have a fur-son who seems to have a stomach issue. He's always eating grass. But not just any grass...he seeks out certain weeds & very carefully bites off the top of each stalk individually. Do you have any advice. Please & thank you.
Be blessed, Kriss VanOrnum✌☺

Dog Eating Grass

Hi Kriss,

Whatever grass your dog may be eating, there are a couple of reasons he may be doing it. He could be have stomach aches and trying to relieve the distress by attempting to vomit, eating large quantities of grass to do so. If your dog has not vomited, it could just be regular dog behavior. They explore the world around them with their mouths, eating and chewing things as they go. If vomiting does occur, take your pup to the vet right away.

Dog throwing up

My 13 year old black lab mix has a problem with throwing up. I took him to the vet and she said that he was having pancreatic problems and gave me pills which helped immediately, but then they stopped working as well. The pills are lifetime, named pannekare.
Good luck.

Throwing up

I was told by my main vet and a couple others, that most generally dogs like to eat grass just because, but they throw it up because their bodies are unable to digest it correctly

I scold my dog away from

I scold my dog away from eating grass, he vomits immediately after, but I thought I read they can get worms, that their eggs are on the grass, which gets in the dog then.

My german shepherd is 56yrs

My german shepherd is 56yrs old..Fiona passed away on 21.5.15..will miss her..

April 26 my pekinesee/cocker

April 26 my pekinesee/cocker spaniel mix will be 83 1/2 . I've had him since he was 5weeks old. Had check up recently vet said he had strong heart that of a puppy. A little arthritis in one hip. For 10 yrs ge ran with my boys for miles through woods. He went every where they did. Now they're grown it's just us 2

My American Cocker is 60 yrs

My American Cocker is 60 yrs old and still loves to play with his toys.And has a very good appetite.

My Jack a poo is the exact

My Jack a poo is the exact same age as me! 32 years young!

My pinkinnise was 4 years old

My pinkinnise was 4 years old are years he would be 32 years Dogie years that a shame the grow so fast I want him to stay a baby . That growing old fast.

That makes my Collie mix

That makes my Collie mix right around 72. Good life!