How to Use Dog Age Calculator

Enter How old the dog is.
Press calculate.

Dog Age Calculator


How to calculate your dog's age

Example 1:
  • Find out if your dog is small, medium or large breed. In our example it is a large dog.
  • Find out the dogs current age. Our dog is 3 years old.
  • We follow the aging done by the American Kennel Club.
  • Our dog's age is 28 human years

You can use our calculator which uses the American Kennel club aging formula.

Note: This calculator gives a rough estimate of a dog's age converted to a humans age, as many factors can affect a dog's age. For a more concrete answer visit a Veterinarian.

The common accepted belief is that 1 human calendar year is the equivalent of 7 dog years. Or to multiply your dog’s age by 7 to determine its human’s age. Although this has been the popular opinion, many factors come into play for assessing the age of your dog in relation to human years. Using this calculator, we take the variables of their age, breed, and size to give you an estimate of your pooch’s human age.

More accurately, the first two years of a dog’s life accounts for the most significant growth. The first year of dog’s life is actually a whopping 15 years old equivalent in human age, and the second year is an estimated 9 years addition, meaning 24 canine years. After the first 2 years, each calendar human year equates roughly 3-5 dog years.

The difference in aging between size and breed will become apparent later in the dog’s life. Smaller breed dogs will arrive at seniority around age 10, whereas a larger breed dog will become middle aged at around 5-6 years old.

You can define the size of the dog by weight:

  • Small (up to 20lbs)
  • Medium (21lbs-50lbs)
  • Large (50+lbs)
  • Giant (100+lbs)

Even without knowing the birthday of a dog, you can give a general assessment to determine their age. Checking their teeth can be a good indicator. Though these guidelines may vary from dog to dog and be dependent on whether they had proper dental care prior to.

  • By 8 weeks: All baby teeth are in
  • By 7 months: All permanent teeth are in and are white and clean
  • By 1 -2 years: Teeth are duller and the back teeth may have some yellow coloring
  • By 3-5 years: All teeth may have some tartar build up and some tooth wear
  • By 5-10 years: Teeth show more wear and sign of disease
  • By 10 – 15 years: Teeth are worn and heavy tartar build up is likely. Some teeth may be missing.

A visit to your vet will provide a more accurate examination. They can help determine your dog’s age during a physical examination or tests that look at bones, joints, muscles and internal organs. Senior dogs may show specific signs of aging.

  • Cloudy eyes
  • Gray hairs (usually starts around the muzzle, spreading to the head and other areas of the body)
  • Loose skin
  • Stiff legs

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