Is 1 dog year really 7 human years?

No — the ×7 rule is a myth. Dogs age fast early then slow down, and larger dogs age quicker. This calculator uses the AVMA size-based table and the 2020 UCSD study.

How old is a 10-year-old dog in human years?

About 56–79 human years depending on size (small to giant) on the AVMA method.

Dog Age Calculator

Enter your dog's age and size to see their human-equivalent age and life stage. Switch between the AVMA size-based table and the 2020 UC San Diego science formula.

Age (years)SizeBreed (optional)

Enter your dog's age to see its human-equivalent age and life stage.

General guidance only — not veterinary advice. Consult your vet for any health decision. Sources: AVMA, AKC, UCSD 2020 (Cell Systems).

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Frequently asked questions

Is 1 dog year really 7 human years?: No — the ×7 rule is a myth. Dogs age fast early then slow down, and larger dogs age quicker. This calculator uses the AVMA size-based table and the 2020 UCSD study.
How old is a 10-year-old dog in human years?: About 56–79 human years depending on size (small to giant) on the AVMA method.