An estimated lifespan for domestic cats is 12-15 years, though some can live into their early 20s. Factors influencing a cat’s longevity include breed, diet, lifestyle, and access to veterinary care. Indoor cats generally live longer than outdoor cats due to reduced exposure to hazards like traffic accidents, predators, and diseases. Regular check-ups, a balanced diet, and a safe environment contribute to a cat’s overall health and can help them live a long and fulfilling life.