A free online dog age calculator that converts your dog's age to human years using AKC veterinary formulas. Select your dog's size (small, medium, large) for the most accurate conversion, see life stage milestones, and get senior care tips.
Enter your dog's age in years.
Select your dog's size: small, medium, or large.
View the human age equivalent instantly.
Check the life stage milestone and care tips.
The first year equals 15 human years, the second adds 9, and each subsequent year adds 4 (small), 4.5 (medium), or 5 (large) years depending on breed size.
Larger dogs age faster than smaller dogs. A 10-year-old Great Dane is considered very senior, while a 10-year-old Chihuahua may still be active.
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