The old 7x rule is outdated. Research shows dogs age rapidly in year 1 (equivalent to ~30 human years), then slow down. Large breeds age faster than small breeds.
Life Expectancy by Breed Size
Frequently Asked Questions
Is the 7x dog age rule accurate?+
No — a 2019 study found the relationship is logarithmic, not linear. A 1-year-old dog is roughly equivalent to a 30-year-old human.
Do large dogs age faster?+
Yes. Large breeds (Golden Retrievers, Labradors) typically live 10–12 years. Small breeds (Chihuahuas) can live 14–16 years.
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