How much water does a bathtub hold?
Standard bathtub capacity is 42 U.S. gallons. This is up to the bottom of the overfill drain. Since there are about 3.785 liters in each gallon that makes the metric capacity about 159 liters.
Bathtubs come in many shapes and sizes... It really just depends on what kind of bathtub you have. On average though, the common bathtub will hold between 50 and 60 litres of water I think.