age of a dog compared to human
Under this system, a 6-year-old dog would be described as having an age of 6 human years or 40â50 (depending on the breed) dog years. The other common system defines dog years to be the actual calendar years (365 days each) of a dog's life, and human years to be the equivalent age of a human being. By this terminology, the age of a 6-year-old dog is described as 6 dog years or 40â50 human years, a reversal from the previous definition.