A bathtub comprising segment boards is disclosed. The bathtub includes a base and walls extending from the base. The walls include a plurality of pairs of segment board receiving sections. Each pair of segment board receiving sections position at opposite walls. The segment board receiving sections are positioned at .sup.rd, , or .sup.rd length of the walls. The bathtub includes a panel positioned adjacent to one side of the walls. The panel includes board openings. The board openings are configured to receive the segment boards. The segment boards are removed and inserted in the segment board receiving sections for partitioning the bathtub such that the volume of the bathtub is reduced to , or of its full volume. The segment boards include cam latches for locking the segment boards into the board openings when not in use. The walls include locking members for locking the segment boards.