Dog myth, busted
“One dog year = seven human years.”
Year one ≈ 15 human years. Then it depends on size.
Dogs sprint through adolescence: about 15 human years in year one, 9 more in year two, then 4–7 per year, small dogs slowest and giant breeds fastest. A chihuahua and a Great Dane age on completely different clocks.
Get your dog's real number with the age calculator.
One minute of science
Dogs mature fast early and slowly later. A one-year-old dog is roughly a 30-year-old human, a two-year-old about 42, and each year after adds four to five human years, with big breeds ageing faster than small ones. The 7x rule overstates puppies and understates seniors. Run your dog's real age.
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