Is 1 dog year really 7 human years?

No. On the AVMA table, age 1 is about 15 human years and age 5 is 36 for every size. By age 10, size changes the answer: small 56, giant 79.

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

On the AVMA table: small 56, medium 60, large 66 and giant 79 human years.

Dog Age Calculator

Written by FurStage Editorial TeamReviewed by FurStage Evidence ReviewReview date: July 16, 2026

Enter your dog's age and size. The AVMA table covers ages 1-16 and splits by size after age 5; the UCSD formula is optional and does not adjust for size.

Age (years)SizeBreed (optional)

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

General guidance only — not veterinary advice and not for emergencies. Consult your vet for any health decision. Sources: AAHA, UCSD / Cell Systems, NHGRI.

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Frequently asked questions

Is 1 dog year really 7 human years?: No. On the AVMA table, age 1 is about 15 human years and age 5 is 36 for every size. By age 10, size changes the answer: small 56, giant 79.
How old is a 10-year-old dog in human years?: On the AVMA table: small 56, medium 60, large 66 and giant 79 human years.