Figuring out your dog's age in "human" years isn't as simple as multiplying by seven.
Recently, a team of researchers got together to establish a new and more accurate way of determining a dogs age equivalency.
In order to help with the calculations, you need to use a natural logarithm calculator.
Researchers concluded that the formula for working out the human age of a dog is human_age = 16ln(dog_age) + 31.
Simply, this equation implies that nine months for a human is around seven weeks for a dog.
While the formula doesn't fully address the fact different dog breeds age at different speeds, the scientists still consider it to be more accurate than the old "multiply by seven" method.