Dog years to human years

dog years to human years

Want to convert dog years to human years? Then you must have heard the "multiply the dog's age by seven" advice, which is not entirely correct.

First of all, dogs age rapidly during the first years of their life. A one-year-old dog is 15 years old in human equivalent (yes, that's one furry teenager in your house!)

Secondly, dog age in human years depends on the breed or size. Smaller dogs generally live longer that their bigger relatives (if you're curious, read more about dog's life expectancy). Here is how you determine the size of your dog by normal weight:

  • small dogs: up to 20 lbs / 9 kg;
  • medium dogs: 21-50 lbs / 10-22 kg;
  • large dogs: 51-100 lbs / 23-45 kg;
  • huge dogs: 100+ lsb / 46+ kg.

Dog years to human years calculator

Convert dog years to human years using our online dog age converter. Select one of 221 dog breeds* or choose your dog's size to get as accurate dog's human age estimation as possible:





Small dog's age in human years

To convert a small dog's age (breeds like Chihuahua, Shih Tzu,or Lhasa Apso) to human age, you should know that:

  • the first small dog's year is equal to 15 human years;
  • the second year adds 9 more years to the human age;
  • each subsequent year is equal to 4 years in human years.

Here are some examples of dog years converted to human years for small dogs:

  • 3 is 28 in human years
  • 9 is 52 in human years
  • 18 is 88 in human years

Medium dog's age in human years

For medium dogs (breeds like Bulldogs, Collies, Basset Hound, and others), use the following information:

  • at two years, their human age is 24 years;
  • after turning 6 years old each medium dog's year is equal to 4-5 human years;

Here are some examples of dog years converted to human years for medium dogs:

  • 6 is 42 in human years
  • 8 is 51 in human years
  • 15 is 83 in human years

Large dog's age in human years

For large dogs (breeds like Cane Corso or Siberian Husky), their human age up until 6 years is the same as for medium dogs. After turning 6 years old each large dog's year is equal to 5-6 human years.

Here are some examples of dog years converted to human years for huge dogs:

  • 7 is 50 in human years
  • 11 is 72 in human years
  • 16 is 99 in human years

Huge dog's age in human years

Huge dogs (breeds like Great Dane or Akita) age a bit slower in the first two years. But by the age of 6, they're already 49 in human years, with each subsequent year adding 7-8 more years to the human age.

Here are some examples of dog years converted to human years for huge dogs:

  • 3 is 31 in human years
  • 10 is 79 in human years
  • 18 is 135 in human years

So, if we take a small 10-year-old Chihuahua as an example, her human age would be 56 years. And a huge Bernese Mountain Dog of the same age would have already lived 79 years as a human!

Is knowing your dog's human age important?

Not obligatory at all, but it might come useful for two main reasons:

  1. It's fun! Imagine that a 38-years-old you and your 4-years-old Akita are actually of the same human age - how cool is that?
  2. Better understanding. Why has your dog's behaviour changed? Why are there signs of him or her aging already? You might find the answers to these questions with a dog-to-human age conversion.

Dog age chart


dog years to human years chart

How do dogs age?

Dogs have 4 main life stages:

  1. Puppy stage is short, from birth to between 6 and 18 months. As mentionned before, the larger the dog - the longer it'll stay a puppy. But after 18 months no dog is considered a puppy anymore.
  2. Adolescent stage. Starts between 6 and 18 months and last up to 18-36 months depending on the dog's size
  3. Adulthood stage. Also depending on the dog's size begins between 18-36 months. It lasts for 2-3 years for large dogs and up to 5 years for smaller breeds
  4. Senior stage. Begins when a dog is 5-7 years old. At this point dog owners might notice first signs of their dog's aging. So now it's time to pay even more attention to proper care.

A cattle dog named Bluey from Australia was the oldest dog ever to live. Bluey died at the age of 29.5 years (depending on Bluey's size, she could be from 134 to 215 years old in human years!).

* list of the dog breeds available: Affenpinscher, Afghan Hound, Airedale Terrier, Akita, Alaskan Klee Kai, Alaskan Malamute, American Bulldog, American English Coonhound, American Eskimo Dog, American Foxhound, American Hairless Terrier, American Leopard Hound, American Staffordshire Terrier, American Water Spaniel, Anatolian Shepherd Dog, Appenzeller Sennenhund, Australian Cattle Dog, Australian Kelpie, Australian Shepherd, Australian Stumpy Tail Cattle Dog, Azawakh, Barbado da Terceira, Barbet, Basset Fauve de Bretagne, Basset Hound, Bavarian Mountain Scent Hound, Bearded Collie, Beauceron, Belgian Laekenois, Belgian Malinois, Belgian Sheepdog, Belgian Tervuren, Bergamasco Sheepdog, Berger Picard, Bernese Mountain Dog, Bichon Frise, Biewer Terrier, Black and Tan Coonhound, Black Russian Terrier, Bloodhound, Bluetick Coonhound, Boerboel, Bohemian Shepherd, Bolognese, Border Collie, Borzoi, Boston Terrier, Bouvier des Flandres, Boxer, Boykin Spaniel, Bracco Italiano, Braque du Bourbonnais, Braque Francais Pyrenean, Briard, Brittany, Broholmer, Brussels Griffon, Bull Terrier, Bulldog, Bullmastiff, Cairn Terrier, Canaan Dog, Cane Corso, Carolina Dog, Catahoula Leopard Dog, Caucasian Shepherd Dog, Cavalier King Charles Spaniel, Central Asian Shepherd Dog, Chesapeake Bay Retriever, Chihuahua, Chinese Crested, Chinook, Chow Chow, Clumber Spaniel, Collie, Corgi, Coton de Tulear, Croatian Sheepdog, Curly-Coated Retriever, Czechoslovakian Vlcak, Dachshund, Dalmatian, Dandie Dinmont Terrier, Deutscher Wachtelhund, Doberman Pinscher, Dogo Argentino, Dogue de Bordeaux, Drentsche Patrijshond, Drever, Dutch Shepherd, English Foxhound, English Setter, English Springer Spaniel, Entlebucher Mountain Dog, Estrela Mountain Dog, Eurasier, Flat-Coated Retriever, French Bulldog, French Spaniel, German Longhaired Pointer, German Pinscher, German Spitz, German Wirehaired Pointer, Glen of Imaal Terrier, Gordon Setter, Grand Basset Griffon Vendéen, Great Dane, Great Pyrenees, Greyhound, Hamiltonstovare, Hanoverian Scenthound, Havanese, Hokkaido, Hovawart, Ibizan Hound, Icelandic Sheepdog, Irish Setter, Irish Water Spaniel, Irish Wolfhound, Italian Greyhound, Japanese Akitainu, Japanese Chin, Jindo, Kai Ken, Karelian Bear Dog, Keeshond, Kishu Ken, Komondor, Kromfohrlander, Kuvasz, Lapponian Herder, Leonberger, Lhasa Apso, Lowchen, Maltese, Mastiff, Miniature American Shepherd, Miniature Pinscher, Miniature Poodle, Miniature Schnauzer, Mountain Cur, Mudi, Neapolitan Mastiff, Nederlandse Kooikerhondje, Newfoundland, Norfolk Terrier, Norrbottenspets, Norwegian Buhund, Norwegian Elkhound, Norwich Terrier, Nova Scotia Duck Tolling Retriever, Old English Sheepdog, Otterhound, Papillon, Parson, Jack Russell and Russell Terriers, Pekingese, Perro de Presa Canario, Pharaoh Hound, Plott Hound, Pointer, Polish Lowland Sheepdog, Pomeranian, Poodle (Standard), Porcelaine, Portuguese Podengo, Portuguese Pointer, Portuguese Sheepdog, Pudelpointer, Pug, Pyrenean Mastiff, Pyrenean Shepherd, Rafeiro do Alentejo, Redbone Coonhound, Rhodesian Ridgeback, Romanian Mioritic Shepherd Dog, Russian Toy, Russkaya Tsvetnaya Bolonka, Saint Bernard, Saluki, Schapendoes, Schipperke, Scottish Deerhound, Scottish Terrier, Segugio Italiano, Shih Tzu, Shikoku, Siberian Husky, Silky Terrier, Skye Terrier, Sloughi, Slovakian Wirehaired Pointer, Slovensky Cuvac, Slovensky Kopov, Small Munsterlander, Spanish Mastiff, Spanish Water Dog, Stabyhoun, Swedish Lapphund, Swedish Vallhund, Taiwan Dog, Teddy Roosevelt Terrier, Thai Ridgeback, Tibetan Mastiff, Tibetan Terrier, Tornjak, Tosa, Toy Fox Terrier, Toy Poodle, Transylvanian Hound, Treeing Tennessee Brindle, Vizsla, Volpino Italiano, Weimaraner, West Highland White Terrier, Wetterhoun, Whippet, Wirehaired Pointing Griffon, Wirehaired Vizsla, Working Kelpie, Yakutian Laika, Yorkshire Terrier