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How Cat Years Actually Work: Why Indoor Cats Live a Decade Longer
How Cat Years Actually Work: Why Indoor Cats Live a Decade Longer The "multiply by 7" rule is wrong for cats — even more wrong than it is for dogs. A 1-year-old cat is not 7 in human terms; it's 15, a sexually mature young adult. By age 2, your cat is 24 in human years. After that, each cat year adds only 4 human years. But here's the number that actually matters: indoor cats live 15-20 years on average, while outdoor cats average just 2-5 years. That's not a small difference — a UC Davis veterinary study(https://healthtopics.sf.ucdavis.edu/sites/g/files/dgvnsk6721/files/inline-files/Cats-Indoors-or-Outdoors.pdf) found indoor cats live up to 3.5 times longer than outdoor cats. Where your cat lives is a bigger predictor of lifespan than breed, diet, or genetics. At UseCalcPro, we built our cat age calculator after noticing something in the data: cat owners consistently overestimate young cats' ages and underestimate senior cats'....