If you already know when your dog was born, and simply want to convert dog years to human years, you can use two different methods – we recommend the first one (dog years to humarn years calculator based on the breed), as it is more accurate:
Calculator to Convert Dog Years to Human Years (Based on the Breed):
When estimating how old your dog is in human years, the primary factor to consider is your dog’s breed. Small breeds live longer on average and age more slowly than larger breeds: small breeds live as much as 50-80% longer than larger breeds and experience the negative effects of aging later in life compared to large breeds.
Research also shows that neutering status, and, to a lesser extent, sex are important factors to take into account. As a result, we have also taken these factors into account in our own calculator.
Use the calculator below to estimate your dog’s age in human years:
If your dog is a mixed breed, a reliable way to convert your dog’s age to human years is to use your dog’s size or weight.
Studies Used to Build the Calculator
Estimating a dog’s age in human years is not that simple. We have read and reviewed data from multiple studies to conclude that a breed-based calculator would be best.
To build the formula behind this calculator, we have used the following studies:
- Mortality in over 350,000 insured Swedish dogs from 1995-2000 included breed-specific age and survival patterns.
- Lifespan of companion dogs seen in three independent primary care veterinary clinics in the United States
- Mortality data on 5663 deceased dogs registered with the UK Kennel Club owner survey.
- “Do Female Dogs Age Differently Than Male Dogs?” from the The Journals of Gerontology
- Longevity and Mortality of Owned Dogs in England in The Journal Of Veterinary Medicine.
If Your Dog is a Mixed Breed, Use “Size” to Estimate Human Years:
All in all trying to figure out how old your dog is in ‘dog years’ v ‘human years’ isn’t an exact science. If your dog is mixed breed or if you don’t know your dog’s breed, the next most important factor to consider is size/weight.
To make it a little easier, we have put together this table that translates ‘dog years’ to ‘human years’ for small, medium and large breeds.
|Your Dog’s Age||‘Real’ Age – Small||‘Real’ Age – Med||‘Real’ Age – L & XL|
But if you don’t know when your dog was born, how can you best estimate your dog’s age? Read our post on “How Old Is My Dog?” for easy tips to estimate how old your dog really is.
Disclaimer: This website's content is not meant to be a substitute for veterinary care, diagnosis, or treatment. Always consult with your veterinarian to determine the best course of action. Read More.