Convert your dog's age into approximate human years using a common veterinary curve that varies by breed size.
All processing runs locally in your browser. Your data is not uploaded to any server.
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All results are approximate and are not veterinary advice.
How to Use the Dog Age Calculator
Enter your dog's age in years, choose its breed size, then press Calculate. The tool converts the age into an approximate human age. Use Clear to reset the form.
How the conversion works
The first year of a dog's life is counted as about 15 human years, and the second year adds about 9 more.
Each year after that adds roughly 4–7 human years depending on breed size — smaller dogs age more slowly.
The curve is a widely used approximation; individual dogs and breeds vary.
Results are for general interest and are not veterinary advice.
Features
Size-aware conversion for small, medium, large and giant dogs
Accepts fractional ages, so puppies can be entered in decimals
Instant results with a single click and a copy button
Works on desktop, tablet and mobile with no sign-up
All processing runs locally in your browser. Your data is not uploaded to any server.