Is 1 dog year really 7 human years?

No. At age 1 the AKC chart gives 15 human years for small, medium and large dogs, and 12 for giant dogs. At age 5: 36 and 45 respectively. These are approximate comparisons.

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

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

Dog Age Calculator

Written by FurStage Editorial TeamUpdated: September 5, 2026

Enter age and adult size. The AKC chart covers ages 1–16; the giant column differs from age 1. The optional UCSD formula does not adjust for size.

Calculating age for Hazel

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

Age (years)SizeBreed (optional)

Expected lifespan scenario, years (optional)Dogs enter senior care in the last quarter of estimated lifespan (AAHA). Enter an estimate discussed with your veterinarian, from 2 to 30 years. This is a scenario, not a prediction; without it we show no dog-stage countdown.

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: AKC — age chart, AAHA, UCSD / Cell Systems, NHGRI.

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Frequently asked questions

Is 1 dog year really 7 human years?: No. At age 1 the AKC chart gives 15 human years for small, medium and large dogs, and 12 for giant dogs. At age 5: 36 and 45 respectively. These are approximate comparisons.
How old is a 10-year-old dog in human years?: On the AKC table: small 56, medium 60, large 66 and giant 79 human years.