How old is she in dog years?

Let’s say Astrid is about 13 calendar years old. That makes her roughly 73 in “human years.” Yeah, it’s not 7:1. Rover has a great summary and the formula:

[T]he pattern of aging in dogs, relative to humans, follows a logarithmic law, suggesting that dogs age much more quickly than we might have previously predicted in the early part of their life, achieving adulthood at a chronologically younger age when they still might look much like puppies.

Based on this data we can give you three methods to compute your dog's age in human years, depending upon how much precision you would like. The most precise method involves the empirical equation that the researchers discovered, which is 16 x ln(dog’s age) +31 = human age, (that is the natural logarithm of the dog’s real age, multiplied by 16, with 31 added to the total.)