There is an old myth that states that you have to multiply a dogs age in years by seven to equal the age in human years. For example, your dog is 2 years old, which should make him 14 years old in our age – that I’m afraid is not correct.
In fact, the correct formula to use when working out a dogs human age is the 15-10-5 rule. That is to say, in the first year of your dogs life he will be the equivalent of 15 years old – a fully fledged teenager.
For his second year, you would add another ten onto it making him in his mid twenties by the time he’s two, finishing off with adding five years for every dog year after that – for example by the time your dog is four he would in fact be the same as a 35 year old human.
The average lifespan of a dog is somewhere in the region of 12 years old, which would make him around 75 years old in human years.