Dog Age Calculator
Find your dog's age in human years. The old 'multiply by 7' rule is a myth — dogs mature fast early on, and larger breeds age quicker later, so this uses a size-based estimate.
How to use
Enter your dog's age in years and pick its size category. The result shows the approximate human-age equivalent.
The first year counts as about 15 human years, the second adds around 9 more, and each year after that depends on the breed's size.
FAQ
Is one dog year really seven human years?
No — that's a rough myth. Dogs age much faster in their first two years, then more slowly, and large breeds age faster than small ones.
How is it calculated?
Year 1 is about 15 human years, year 2 brings the total to about 24, then each additional year adds roughly 4 (small) to 7 (giant) years.
Why does size matter?
Smaller dogs live longer and age more slowly in later years; giant breeds age fastest. Size gives a better estimate than a single formula.
Is it exact?
It's an estimate for fun and general guidance — actual aging varies by breed, health and individual dog.