When it comes to selecting the ideal height for a bathtub, it’s important to consider factors like usability and safety. For bathtubs used as both a tub and shower, a height of around 20 inches is recommended. However, it’s important to note that there is a difference between the height of the bathtub and the water level. Bathtub height refers to the distance from the bathroom floor to the top of the tub rim, also known as the step-over height. On the other hand, water height refers to the depth of water in the tub, which is measured from the floor of the tub to the bottom of the overflow. Ultimately, the best height for a bathtub will depend on individual preferences and needs.