Dog Age Calculator
Convert your dog's age to human years using breed-specific and size-based formulas.
Embed this toolYour Medium dog
3 dog years
≈
28 human years
Life stage: Adult
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How Dogs Age
Dogs do not age at a constant rate. Their first year equals roughly 15 human years. Their second year adds about 9 more. After that, each dog year equals 4-8 human years depending on breed size.
Average Lifespans by Size
- Small breeds: 10-15 years (Chihuahuas, Dachshunds, Poodles)
- Medium breeds: 10-13 years (Beagles, Bulldogs, Corgis)
- Large breeds: 8-12 years (Labradors, Golden Retrievers)
- Giant breeds: 6-10 years (Great Danes, Mastiffs, St. Bernards)
Frequently Asked Questions
No. The 1:7 ratio is a myth. Dogs age much faster in their first two years, and smaller breeds generally live longer than larger breeds. A 1-year-old dog is roughly 15 in human years.
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