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The first year of a dogs life is equal to 15 human years. The second year of a dog’s life is equal to about nine human years. Each additional year is equal to about four or five human years.<\/p>\n
Historically, it is very likely that the one dog year equals seven human years method was created to simply show that dogs age faster than humans. Today, scientists and researchers have developed a more precise method of calculating a dogs age to human years.<\/p>\n
Human and dog DNA changes over time looking at patterns called methyl groups in humans and Labrador Retrievers. From this research, they concluded that you can calculate a dog\u2019s age to human years by multiplying the natural logarithm of the dog\u2019s age by 16 and adding 31. Their formula looks like this: (human_age = 16ln(dog_age) + 31). As you can see, this formula is pretty complex, so it can be useful to plug in your dog\u2019s age to an automatic calculator programmed with this formula, like the one here.<\/p>\n
For an easier (and also accurate) way to estimate your dog\u2019s age, you can follow this methodology for small, medium, and large dogs under 100 lbs.<\/p>\n
The first year of a dog\u2019s life is equal to 15 human years.\u00a0<\/p>\n
The second year of a dog\u2019s life is equal to about nine human years.<\/p>\n
Each additional year is equal to about four or five human years.<\/p>\n
Because it takes into account that not all dogs breeds age the same way. In general, smaller dogs live longer than larger dogs, so while a seven-year-old Great Dane might be considered a \u201csenior\u201d dog, the same is not necessarily true for a seven-year-old Chihuahua. Therefore, it is helpful to break down a dog age chart in terms of size.<\/p>\n
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