Pet age calculator

Dog Age to Human Age Converter

Convert your dog’s exact age to a human-age estimate, compare all four size groups and see its current life stage with practical care priorities.

Build your dog’s age profile

Enter years and months or use a known date of birth. Adult size changes the ageing curve, especially after the first two years.

How old is a one-year-old dog in human years?

Most one-year-old dogs are commonly compared with a human in the early to mid-teens, although giant breeds mature differently.

Why does dog size change the result?

Small dogs generally age more slowly during adulthood than large and giant dogs, which often enter the senior stage earlier.

Can I calculate a puppy’s age in months?

Yes. Choose known age and enter zero years plus the number of completed months, or use the date of birth.

Is the result a health or lifespan prediction?

No. It is an educational comparison. Your veterinarian can assess health, body condition and breed-specific risks.

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