Dog Age Calculator
Based on the American Veterinary Medical Association (AVMA) evidence-based formula, this tool converts your dog's age into human-equivalent years and identifies their life stage.
Equivalent human age
28 yrs
Currently: Adult
Based on AVMA Canine Life Stage Guidelines
The American Veterinary Medical Association defines standardized life stage thresholds to guide preventive care, nutrition, and veterinary screening schedules.
How Does the Dog Age Calculator Work?
The old "1 dog year = 7 human years" rule is a myth. A 1-year-old dog is equivalent to a 15-year-old human, and by age 2 that jumps to 24 human years. After that, each dog year adds roughly 4 human years.
Conversion Formula
Age 1 yr → 15 human yrs | Age 2 yrs → 24 human yrs | Each additional yr → +4 human yrs
Source: AVMA. Canine Life Stage Guidelines. JAVMA, 2019; 255(1): 1-16.
Dog Life Stage Reference Chart
Puppy → Young adult (≈15 yrs)
Young adult (15–28 human yrs)
Adult (28–52 human yrs)
Senior (52–68 human yrs)
Geriatric (68+ human yrs)
Frequently Asked Questions
Does breed size affect when a dog becomes a senior?
At what age does the senior life stage begin?
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Disclaimer: This calculator is based on AVMA guidelines for general educational purposes only. It does not constitute veterinary advice. Always consult a licensed veterinarian for health decisions specific to your dog.