A 1-year-old dog is about
15
in human years, whatever the size
Nearly grown and full of energy. Training and exercise matter most.
A 1-year-old dog is about 15 in human years, and size makes no difference this early. If you're not sure which size your dog counts as, medium (21 to 50 lb or 10 to 23 kg) is a fair middle guide, at 15.
Bigger dogs age faster after the first two years, which is why the numbers spread out as dogs get older. The life stage shown above is for a medium dog.
Dog size
A 1-year-old dog is about 15 in human years, and size makes no difference this early.
Generally, yes. Larger dogs tend to age faster and have shorter lives, which is why the chart gives bigger dogs a higher human age at the same calendar age.
Go by adult weight: small is up to 20 lb (9 kg), medium is 21 to 50 lb (10 to 23 kg), large is 51 to 90 lb (23 to 41 kg), and giant is over 90 lb (41 kg).
See the full dog years to human years chart, or compare with a 1-year-old cat.