A moderate urge normally occurs after about 300 ml is in the bladder. When someone is in a situation where they cannot reach the bathroom easily, often bladder can store as much as 1 liter (1,000 ml) but with some obvious discomfort.

Can the human bladder hold 1 liter?

A healthy human bladder can hold between 400 to 500 milliliters of urine, or about 2 cups, before it reaches capacity.

How many liters of urine can the bladder hold?

The urinary bladder can store up to 500 ml of urine in women and 700 ml in men. People already feel the need to urinate (pee) when their bladder has between 200 and 350 ml of urine in it.