Question

What's the best estimate for the volume of a bathtub?

Answer 1

Most people use about 30 gallons of water for a bath, according to industry estimates. When filled to capacity (just below the overflow), a standard bathtub holds 42 gallons, but some of that water will be displaced when you get into the tub.

Explanation:

Answer 2

To start, the standard bathtub will hold roughly around 80 gallons (302 liters) of water. Much smaller bathtubs can only hold around 40 gallons (150 liters) of water, which typically are more suited for smaller children or function more as a shower space.