Free tool

Dog age in human years

Forget multiplying by seven. Dogs grow up in a flash and then age at a pace that depends on their size.

Years

Months

Breed (optional)

Picking a breed sets the size from the typical adult weight.

Adult dog sizesmall, up to 9 kgmedium, 9–23 kglarge, 23–45 kggiant, over 45 kg

Age in human years

–years

–life stage

–by the epigenetic clock (Labradors)

Chart: dog years to human years

Dog age in human years by size (AKC)
Dog's age	Small	Medium	Large	Giant
1 year	15	15	15	12
2 years	24	24	24	22
3 years	28	28	28	31
5 years	36	36	36	45
7 years	44	47	50	56
10 years	56	60	66	79
12 years	64	69	77	93
14 years	72	78	88	107
16 years	80	87	99	121

Size: small up to 9 kg (20 lb), medium 9 to 23 kg (20 to 50 lb), large 23 to 45 kg (50 to 100 lb), giant over 45 kg (100 lb). Source: American Kennel Club.

Frequently asked questions

How old is my dog in human years?

A dog's first year equals about 15 human years, and the second adds about 9 more. After that the pace depends on size: a 10-year-old small dog is about 56 in human years, a giant dog about 79.

Is one dog year really 7 human years?

No. The "times seven" rule is a myth. Dogs mature very fast in their first two years and then age more slowly, with large breeds aging faster than small ones.

When is a dog considered a senior?

Large and giant breeds become seniors at around 6 to 7 years, medium breeds at about 8 and small breeds at about 10. From that age it is worth having preventive checkups more often.

What is the epigenetic clock for dogs?

It is a formula from a study by Wang et al. (2020), based on DNA methylation changes in Labrador Retrievers: human age = 16 × ln(dog age) + 31. It describes puppies and seniors well, but it was built from a single breed, so we show it for comparison.

Sources

Results are estimates and do not replace advice from a veterinarian.

Chart: dog years to human years

Frequently asked questions

Sources

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