About Dog Age Calculator
Dogs mature quickly in their first two years and more slowly after that, so the old rule of multiplying by 7 is inaccurate. This calculator uses a common veterinary guideline: the first year equals about 15 human years, the second year adds 9, and each later year adds 4 for small dogs, 5 for medium dogs, or 6 for large dogs. It is a rough comparison, since breeds age differently.
How to use Dog Age Calculator
- Fill in "Dog age" and "Size".
- The result appears below and updates as you type.
- Copy the result with the copy button, or download it as a file where that is offered.
Questions about Dog Age Calculator
Why is one dog year not equal to seven human years?
Dogs reach adulthood in about a year, far faster than a 7 to 1 ratio suggests, and then age more slowly. Size also matters: large breeds generally have shorter lives than small breeds.
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