Pet Age Calculator
Choose a dog or a cat, then enter a date of birth or an age. You get an estimate in human years, the general life stage and the working behind it.
Nothing you enter here is sent to us: the estimate is worked out in your browser.
How this works
The calculator uses a simple, openly stated model. The first year of a pet's life counts as 15 human years and the second adds 9, so a two-year-old is about 24. After that every year adds a fixed number of human years: 4 for a cat, and for a dog 4, 5, 6 or 7 depending on size, because larger dogs tend to age faster.
Life stages are general bands of age, not a diagnosis. A cat is usually called a kitten in its first year, a young adult until about 7, a mature adult until about 11, and a senior after that. For dogs the age at which a pet is considered senior is earlier the larger the dog is.
Real animals vary: breed, health, weight and lifestyle all matter. Use the result to understand roughly where your pet is in life, and talk to your veterinarian about what that means for your pet's care.
What next
- Keep your pet's birthday and records in My Pets
Add your pet to SweetCutePets to keep their birthday, health records and reminders in one place. Open SweetCutePets