About PetMath

PetMath makes free calculators for the everyday numbers pet owners look up: how much to feed, how old your pet is in human years, when puppies are due. Every tool shows its formula and a worked example, so you can check the numbers yourself.

Results are estimates based on published veterinary guidelines. Every animal is different, and nothing here replaces advice from your veterinarian. If your pet may have eaten something toxic, call your vet or an animal poison control line right away.

Spotted a mistake or want a calculator we don't have? Get in touch.