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.

Calculating age for Hades

Add an age below and FurStage will keep this name in the care loop.

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.