The answer to 'how long does bathtub last' is that a typical bathtub can last 10-15 years with proper care and maintenance. Bathtubs are made from various materials like porcelain-enameled steel, cast iron, or acrylic, and their lifespan can vary depending on the quality of the material and how well they are cared for.
With regular cleaning, resealing the caulk and grout around the tub, and avoiding abrasive cleaners, a high-quality bathtub can last for over a decade. However, factors like heavy use, hard water buildup, or damage from falls/impacts can shorten a tub's lifespan. If a bathtub starts to show signs of cracking, chipping, or leaking, it's usually time to consider replacing it to prevent further damage.