My Dog
Keep your dog's name, breed, birthday and weight in this browser and see age, human-years age, the breed's typical weight and its news.
Runs entirely in your browser: nothing you enter is sent to this site. Results are estimates for planning, not veterinary advice.
What it does
My Dog keeps up to six dogs' basic details on this device: name, breed, birthday and weight. For each dog it shows age in years and months, an estimate of age in human years, the days until the next birthday, whether the weight sits inside the breed's typical range, and links to the breed's profile and news.
How the numbers are worked out
Human years use the formula from a 2020 study of changes in dogs' DNA with age: 16 times the natural logarithm of the dog's age in years, plus 31. A 5-year-old dog comes out at about 57. It is an estimate for adult dogs of any breed, so it is shown only from the first birthday, and it is not the old "multiply by seven" rule.
The weight check compares the dog's weight with the typical adult range for the breed, which is a range of dogs, not a target. It is shown only for dogs of about a year and a half or older, because puppies are still growing.
Where it stops being right
A mixed-breed dog has no single breed range, so no weight comparison is made for it. A dog that is outside its breed's typical range is often perfectly healthy. A weight that surprises you is a question for your veterinarian, who can judge the individual dog.
Privacy
Your dogs are stored only in this browser, on this device, and only when you press Save. They are never sent to our servers. Remove deletes a dog. Clearing your browser's site data deletes all of them.
Last reviewed November 8, 2026