Why did we build Pawometer?
We built Pawometer because the top-ranking dog age calculators in 2026 were either thin marketing pages with a 7-to-1 multiplier or tools that hid the result behind an email form. We wanted a calculator that answers immediately, shows its math, cites veterinary sources and stays free for every dog owner.
The team is a handful of people who share their homes with dogs ranging from a 9 lb terrier mix to a 110 lb Newfoundland, plus the web developers among us who got tired of clicking through pop-ups to learn that a 6-year-old Lab is not 42. The site started as a weekend project and grew into the set of tools you see now: the main calculator, the reverse human-to-dog converter, the puppy and cat calculators, the size chart and the printable certificate.
Our rule from day one has been that the number comes first and everything else comes after. No account, no gate, no dark patterns.
How does Pawometer calculate dog age?
Pawometer uses the size-adjusted model recommended by the American Veterinary Medical Association: 15 human years at the first birthday, 24 at the second, then 4 to 7 human years per year depending on weight class. For comparison we also show the UC San Diego epigenetic clock, human age = 16 × ln(dog age) + 31.
The primary result on every page follows the AVMA and AKC guidance, with size classes of toy (under 10 lb), small (10 to 20 lb), medium (21 to 50 lb), large (51 to 90 lb) and giant (over 90 lb). Life stages follow the 2019 AAHA canine life stage guidelines. The secondary figure comes from Wang et al. (2020), who compared DNA methylation in dogs and humans. We show both because they answer slightly different questions, and we explain the difference rather than hiding it.
Who reviews the content, and what Pawometer is not
Every formula, life stage definition and health statement on Pawometer is reviewed by our reviewing veterinarian, a licensed DVM, and the review date is shown on each page. Pawometer is an educational tool, not a substitute for veterinary advice, and it never diagnoses or treats anything. Questions and corrections go to [email protected].
The veterinary review page explains the process in detail. In short: nothing that makes a medical or scientific claim is published without a veterinarian reading it, and when guidelines change we update the page and the review date.
What the site cannot do is know your dog. Age in human years is a useful frame for thinking about care, but it does not replace an exam. If you are worried about your dog's health, weight, mobility or behavior, see your veterinarian. If you find an error on the site, a breed weight that looks wrong, or a source that has been updated, email [email protected] and we will fix it.
Sources
Frequently asked questions
Is Pawometer free?
Yes. Every calculator, chart and the printable certificate is free with no account required. The site is supported by advertising, and the optional email form is only for sending yourself a copy of a certificate.
Is Pawometer's dog age calculator accurate?
It is as accurate as the published veterinary guidance it follows, which the AVMA and AKC describe as a size-adjusted estimate rather than a precise measure. Individual dogs vary with breed, genetics and health, so treat the result as a well-informed approximation.
