Convert Dog to Human Age Chart and Calculator

Published: 2021/07/03 - Updated: 2023/07/16
Author: Disabled World - Contact Details
Peer-Reviewed: N/A - Publication Type: Conversion / Calculation
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Synopsis: Easy to read table and calculator shows the equivalent dogs age compared to a humans age in years, includes average dog life expectancy in years by breed. The previous formula that had been used for many years was based on the calculation that 1 dog year equaled approximately 7 human years. The official holder of the world's oldest dog is held by an Australian Cattle Dog named Bluey who died in 1939 at age 29.

Main Digest

No one formula for dog-to-human age conversion is scientifically agreed on. A 2019 study suggests a new formula based on changes made to a dogs' DNA over time. The previous formula that had been used for many years was based on the calculation that 1 dog year equaled approximately 7 human years. Today, as a general rule, the American Veterinary Medical Association states:

The first year of a medium-sized dog equals around 15 human years.
The second year of a dog equates to approximately nine human years - which makes a 2 year old dog equal to a 24 year old human (15+9=24).
After that every human year equals approximately five dog years.

World's Oldest Dog

The official holder of the world's oldest dog is held by an Australian Blue Heeler cattle dog named Bluey who died in 1939 at age 29. Guinness World Records says he was bought as a puppy in 1910 in Victoria, Australia, and worked among cattle and sheep for nearly 20 years before eventually being put to sleep.

Average Age for a Dog

The average age at death for dogs - all breeds, all causes - was 11 years and 1 month, but in dogs dying of natural causes it was 12 years and 8 months. Only 8% of dogs lived beyond 15, and 64%of dogs died of disease or were euthanized as a result of disease - (wikipedia.org/wiki/Aging_in_dogs).

Dog Age Equivalent in Human Years Calculator

Dog Age to Human Age Calculator


Your dog equals:

Dog Years to Human Years Table

Dog Years to Human Years Conversion Chart
Size of Dog =	Small	Medium	Large	X Large
Dog Age in Years	Equivalent Human Age in Years
1	15	15	15	12
2	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

Dog Breed Average Life Expectancy in Years

Breed of Dog	Average Life Expectancy in Years*
Afghan Hound	12
Airedale Terrier	11.2
American Staffordshire Terrier	12.3
Basset Hound	12.8
Beagle	13.3
Bearded Collie	12.3
Bedlington Terrier	14.3
Bernese Mountain Dog	7
Border Collie	13
Border Terrier	13.8
Boston Terrier	15
Boxer	10.4
Bull Terrier	12.9
Bulldog	6.7
Bullmastiff	8.6
Cairn Terrier	13.2
Cavalier King Charles Spaniel	10.7
Chihuahua	15
Chow Chow	13.5
American Cocker Spaniel	12.5
Dachshund	12.2
Dalmatian	13
Doberman Pinscher	9.8
English Cocker Spaniel	11.8
English Setter	11.2
English Springer Spaniel	13
English Toy Spaniel	10.1
Flat-Coated Retriever	9.5
German Shepherd	10.3
German Shorthaired Pointer	12.3
Golden Retrievers	12
Gordon Setter	11.3
Great Dane	8.4
Greyhound	13.2
Irish Red and White Setter	12.9
Irish Setter	11.8
Irish Wolfhound	6.2
Jack Russell Terrier	13.6
Labrador Retriever	12.6
Lurcher	12.6
Miniature Dachshund	14.4
Miniature Pinscher	14.9
Miniature Poodle	14.8
Random-bred/Mongrel	13.2
Newfoundland	10
Norfolk Terrier	10
Old English Sheepdog	11.8
Pekingese	13.3
Pomeranian	14.5
Pug	16
Rajapalayam hound	11.2
Rhodesian Ridgeback	9.1
Rottweiler	9.8
Rough Collie	12.2
Samoyed	11
Scottish Deerhound	9.5
Scottish Terrier	12
Shetland Sheepdog	13.3
Shiba Inu	14
Shih Tzu	13.4
Siberian Husky	13.5
Soft Coated Wheaten Terrier	13.2
Staffordshire Bull Terrier	14
Standard Poodle	12
Tibetan Terrier	14.3
Toy Poodle	14.4
Vizsla	12.5
Weimaraner	10
Welsh Corgi	11.3
Welsh Springer Spaniel	11.5
West Highland White Terrier	12.8
Wire Fox Terrier	13
Yorkshire Terrier	12.8

Printable Dog Age Chart: Dog Years to Human Years Conversion Table

Article continues below image.

Printable dog age to human years conversion chart.

Continued...

*Longevity of British breeds of dog and its relationships with-sex, size, cardiovascular variables and disease - A. R. Michell DSc, MRCVS

Convert Cat to Human Age Chart and Calculator: Our calculator and table provide quick conversion of a cats age in years to an approximate equivalent human age.

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