How old is a dog if it is 9 years old in human years? - briefly
To convert a dog's age from human years to dog years, a common rule of thumb is that one human year equals approximately seven dog years for the first two years of a dog's life. After that, each human year is roughly equivalent to four or five dog years. Therefore, if a dog is 9 years old in human years, it would typically be considered around 56 to 70 years old in dog years.
How old is a dog if it is 9 years old in human years? - in detail
To determine how old a dog is in human years when it is 9 years old, we need to understand the common conversion method used by veterinarians and scientists. This method takes into account that dogs age faster than humans during their first two years, then at a slower pace as they grow older.
During the first year of a dog's life, each month is roughly equivalent to 4 human months. So, a 1-year-old dog would be approximately 12 human months old or 1 year in human terms. In the second year, each month is more like 5 human months. Therefore, a 2-year-old dog would be about 24 + 30 = 54 human months old, which translates to roughly 4.5 human years.
After the initial two years, dogs age at a slower rate. Each year of a dog's life is approximately equivalent to 4-5 human years. So, for each year beyond the first two, you add 4-5 human years to the total.
For a 9-year-old dog:
- The first year counts as 12 months or 1 human year.
- The second year adds another 24 months or 2 human years.
- For the remaining 7 years, we add 4-5 human years for each, which gives us a range of 28 to 35 human years.
Adding these together: 1 (first year) + 2 (second year) + 28-35 (remaining 7 years) = 31-38 human years.
Therefore, a 9-year-old dog is roughly equivalent to being between 31 and 38 years old in human terms.