Dog Age to Human Age Conversion Calculator

How Old Is Your Dog In Human Terms

Dog Age Calculator Cat Age Calculator

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Note: This calculator give a rough estimate and may not be accurate. See a veterinarian for age related questions or any other health concerns for your pet.

This calculator determines the age of your dog in equivalent human years or calendar years by specific breed or weight range. This calculator uses dog lifespan data from Wikipedia for the conversion.

Dogs mature at different rates when compared to humans. During the first two years of life, dogs mature rapidly from childhood to adulthood. Typically, dogs will have an equivalent age of approximately fifteen years at one calendar year. At two calendar years, dog will have aged to twenty-four human years. After two years, a canine will age three to five dog years per calendar year.

This calculator allows the user to adjust the rate of aging during the first two years of the dogs life. It defaults to 15 years for the first year and 9 years for the second. The user can adjust these values under the options tab. This is useful to get more accurate results for extremely large or very small pets during the first two years.

Importantly, the conversion for dog years to human years is directly based on human life expectancy. Life expectancy varies by time in history, country and gender (male/female). For example, in 2011 Japan had an overall life expectancy of 83 years and Sierra Leone had a life expectancy of 47. See List of countries by life expectancy for more values. The worldwide average human life expectancy in 2011 was 67.88 years.

This calculator allows the user to adjust human life expectancy used in the calculations. This calculator defaults to sixty-eight years for human life expectancy. The operator can adjust this parameter under the options tab. This is helpful for determining equivalent dog ages in different regions of the world.


  1. Select the dog's breed
  2. Enter the age of the dog in calendar years and months
  3. Optional: Adjust the options for first year aging, second year ageing and human lifespan

Breeds Supported:

This calculator supports the following breeds of dogs: Affenpinscher, Afghan Hound, Airedale Terrier, Akita, Alaskan Malamute, American Cocker Spaniel, American Eskimo Dog, American Foxhound, American Staffordshire Terrier, American Water Spaniel, Anatolian Shepherd Dog, Australian Cattle Dog, Australian Shepherd, Australian Silky Terrier, Australian Terrier, Basenji, Basset Hound, Beagle, Bearded Collie, Beauceron, Belgian Shepherd, Bedlington Terrier, Belgian Shepherd Malinois, Bernese Mountain Dog, Bichon Frise, Black and Tan Coonhound, Black Russian Terrier, Bloodhound, Bluetick Coonhound, Border Collie, Border Terrier, Borzoi, Boston Terrier, Briard, Bouvier des Flandres, Boxer, Boykin Spaniel, Brittany, Bull Terrier, Bulldog, Bullmastiff, Cairn Terrier, Canaan Dog, Cane Corso, Cavalier King Charles Spaniel, Cesky Terrier, Chesapeake Bay Retriever, Chihuahua, Chinese Crested Dog, Chow Chow, Clumber Spaniel, Curly Coated Retriever, Dachshund, Dalmatian, Dandie Dinmont Terrier, Doberman Pinscher, Dogue de Bordeaux, English Bulldog, English Cocker Spaniel, English Coonhound, English Foxhound, English Mastiff, English Setter, English Springer Spaniel, Entlebucher Mountain Dog, Field Spaniel, Finnish Lapphund, Finnish Spitz, Flat-Coated Retriever, French Bulldog, German Pinscher, German Shepherd, German Shorthaired Pointer, German Wirehaired Pointer, Giant Schnauzer, Glen of Imaal Terrier, Golden Retriever, Gordon Setter, Great Dane, Great Pyrenees, Greater Swiss Mountain Dog, Greyhound, Griffon Bruxellois, Harrier, Havanese, Ibizan Hound, Icelandic Sheepdog, Irish Red and White Setter, Irish Setter, Irish Soft-coated Wheaten Terrier, Irish Terrier, Irish Water Spaniel, Irish Wolfhound, Italian Greyhound, Jack Russell Terrier, Japanese Chin, Keeshond, Kerry Blue Terrier, King Charles Spaniel, Komondor, Kuvasz, Labrador Retriever, Lakeland Terrier, Leonberger, Lhasa Apso, Lowchen, Maltese, Manchester Terrier, Mexican Hairless Dog, Miniature Pinscher, Miniature Schnauzer, Neapolitan Mastiff, Newfoundland, Norfolk Terrier, Norwegian Buhund, Norwegian Elkhound, Norwegian Lundehund, Norwich Terrier, Nova Scotia Duck Tolling Retriever, Old English Sheepdog, Otterhound, Papillon, Parson Russell Terrier, Pekingese, Pembroke Welsh Corgi, Petit Basset Griffon Vendeen, Pharaoh Hound, Plott Hound, Pointer, Polish Lowland Sheepdog, Pomeranian, Poodle, Portuguese Water Dog, Pug, Puli, Pyrenean Shepherd, Redbone Coonhound, Rhodesian Ridgeback, Rottweiler, Rough Collie, Saluki, Samoyed, Schipperke, Scottish Deerhound, Scottish Terrier, Sealyham Terrier, Shar Pei, Shetland Sheepdog, Shiba Inu, Shih Tzu, Siberian Huskie, Skye Terrier, Smooth Fox Terrier, Spinone Italiano, St. Bernard, Staffordshire Bull Terrier, Standard Schnauzer, Sussex Spaniel, Swedish Vallhund, Tibetan Mastiff, Tibetan Spaniel, Tibetan Terrier, Toy Fox Terrier, Treeing Walker Coonhound, Tervuren, Vizsla, Weimaraner, Welsh Springer Spaniel, Welsh Terrier, West Highland White Terrier, Whippet, Wire Hair Fox Terrier, Wirehaired Pointing Griffon, Xoloitzcuintle and Yorkshire Terrier.

If you do not see a breed, please send an email to with the missing breed. If you have any information on where the information can be found please include it in the email.

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