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How to calculate your dogs age

In the past, we have roughly measured our dog's age in comparison to human years with an equation of 1 dog year being the equivalent of 7 human years. This calculation came to light back in the 1950's & is no longer an accurate tool to calculate your dog's age. Companion dogs age approximately seven to ten times faster than humans do. Researchers today have concluded that the process of calculating our dogs' age in human years is not so simple. Several influencing factors come into play in this calculation. 

  • Breed
  • Environment, lifestyle & diet
  • Healthcare

In fact, according to a recent publication from The Dog Aging Project, "Big dogs tend to age the fastest -- maybe 10 times faster than humans -- while little breeds may live to be 20 years old, with "dog years" about five times human years".

 What is your dog's lifespan? 

Current guidelines now conclude the following :

  • 15 human years equals the first year of a small-large sized dog’s life.
  • A 2-year-old dog is equivalent to 9 human years.
  • And after that, each human year would be approximately five years for a dog.

Although this is general, other factors will influence this calculation, for example, larger breeds tend to have a shorter life expectancy than smaller breeds. A Great Dane has an average lifespan of 7-10 years. This would see a 4-year-old Great Dane calculated as 38 human years.

Dog Age Conversion to Human Years Chart
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