Dog Age Calculator 🐶

Find out exactly how old your dog is in human years based on their size and age.

Dog's Age (Years)
Dog's Age (Months)
Dog's Size / Breed

How to Convert Dog Years to Human Years?

For a long time, people believed that 1 dog year equaled 7 human years. However, modern veterinary science tells us that dogs mature much faster in their first two years of life. Our Free Dog Age Calculator uses the latest scientific formulas recommended by the American Veterinary Medical Association (AVMA).

The New Rule of Thumb:

  • Year 1: Equals about 15 human years.
  • Year 2: Adds about 9 more human years (making a 2-year-old dog 24 in human years).
  • Year 3+: Each additional year adds about 5 human years for small dogs, 6 for medium dogs, and 7 for large dogs.