The Doggy age calculator normally takes as input the number of years your Puppy has lived (Pet dog age, Canine years) and converts the Pet dog age to a human years equal determined by a scientific formula. Canine age charts such as one created by Zoetis show the human years https://israeltimwf.theisblog.com/33957208/convert-dog-years-to-human-years-for-dummies