1 Dog year equals 7 Human years of life
human age = 16 ln(dog_age) + 31
Every human year not equivalent to seven dog years, scientists find
Study of DNA changes in labradors suggests puppies age much faster than older dogs
Thu 2 Jul 2020 15.07
"Dogs do not simply age at seven times the rate of humans, scientists have found in a study that reveals young dogs might be “older” than previously thought.
The findings suggest a one-year-old puppy is actually about 30 in “human years” – an age when humans, at least, might be expected to have stopped running riot with the toilet paper.
However the rate of ageing in dogs, compared with humans, slows down as the years roll by.
Indeed, the findings suggest a one-year-old dog would have a “human age” of about 30, while by the age of four they’d be about 54 in “human years” and by 14 years old they would be on a par with a human in their mid-70s.
The relationship, the team say, is described by the formula: human age = 16 ln(dog_age) + 31. In maths, ln refers to the natural logarithm of a number."