As of 2015, the average cost to replace a bathtub is $1,030 to $4,594. It costs homeowners as little as $225 for a low-cost bathtub and DIY installation to more than $8,000 for a high-end bathtub with professional installation.
A good portion of the costs are in the labor since it is a labor-intensive type of job. For the bathtub itself, fiberglass is among the least expensive, usually ranging between $200 and $500. Acrylic is the next level up at about $500 to $900 for the bathtub. Enameled cast iron bathtubs have a large price range, going from $500 to $2,000 on average. This depends on the manufacturer, style and size. The most expensive bathtubs are cultured marble, ranging from $1,500 to $2,200.