What Are Dog Years?


Quick Answer

Dogs age at a quicker rate than humans do. The equivalent of a dog's age in human years largely depends on the size of the dog in question. One dog year can be as much as 15 years in human years.

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Full Answer

For dogs of all sizes, including small, medium and large breeds, a dog that is 1 year old has physically matured as much as a human ages in 15 years. The human age equivalent progression is the same for all dog sizes up until a dog reaches 6 years old. Dogs of all sizes that are 5 years old are 36 years old in human years. However, a 6-year-old small dog is equal to 40 in human years, while a large breed, greater than 50 pounds, that is 6 years old is the equivalent of 45 years old in human years.

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