Dog Years Calculator

Use this free dog years calculator to convert your dog’s age to human years by size.

How the dog years calculator works

The first year counts as 15 human years and the second as 9 more. After that each dog year adds 4 (small), 5 (medium), 6 (large) or 7 (giant) human years.

Frequently asked questions

Is the “multiply by 7” rule right?

No. Dogs age faster early on, and large breeds age faster than small ones, so size matters.

Results are estimates for general information only. They are not a substitute for professional advice where applicable. Found a mistake? Report an error.