petcalc
Convert dog years to human years by size and breed
About petcalc
petcalc is a free dog age calculator for owners who want to know how old their dog is in human years. It is aimed at pet owners, including people who adopted a rescue dog with only an estimated age. Users enter their dog's age and expected adult size, optionally add a breed, and see the human-year equivalent along with the dog's life stage.
The calculator follows the AKC age chart based on AVMA guidance and also shows the DNA methylation formula from a 2020 UC San Diego study, with its limits noted. Shelter dogs can be entered as an age range rather than a single number. Pages on the site cover life stages, senior age by size and related care topics.
What sets it apart is that each result is tied to a named source and the site states that estimates do not replace veterinary advice. It is a reference tool rather than a pet care service.
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