Dog Age Calculator

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Switch to find the dog age that matches a given human-equivalent age.
years
Size is the strongest predictor of aging rate. Large and giant breeds age faster and have shorter average lifespans.
The AVMA rule is size-adjusted and widely used by vets. The epigenetic formula is based on DNA methylation in Labrador Retrievers and may be less accurate for very small or very large breeds.
Human-equivalent ageAdult
39years
Life stageAdult
39 human years
Puppy<15Adolescent15-25Adult25-50Mature Adult50-70Senior70-90Geriatric90+

Your 5-year-old medium dog is roughly 39 in human years.

  • After the first two years, each dog year adds 5 human-equivalent years for a medium breed.
  • Life stage: Adult. Annual wellness exams are usually appropriate at this stage.
  • Typical lifespan for a medium breed is around 15 years.

Next stepKeep up regular wellness exams and discuss preventive care specific to your dog's breed and size.

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