How much urination is too much for a single time?

Urination amounts. Too much urination at a time is not as much of a concern as too little volume. Average bladder capacity is 500cc ( 1/4 of a 2 liter bottle of soda) but bladder capacities can range much higher. Small volumes can be from an overactive bladder, small bladder capacity, infection, bladder lining irritation from stones or masses, urethral obstruction.