For fun, figure out how old you are in dog years too! It used to be thought that 1 dog year = 7 human years. That formula has been revised to a complex combination taking the size of the dog into ...

An curved arrow pointing right. Dogs reach sexual maturity around age one. This means, if a dog year were equivalent to seven human years, a seven year old human would be able to procreate.

If you're a dog owner, you have probably heard the popular myth that a single human year is equal to seven 'dog years'. That would make Britain's oldest dog, a 22-year-old Staffy from Devon named ...