urine output per day
The normal range for an adult urinary output is between 400 to 2,000 mL of urine daily -- with a normal fluid intake of about 2 liters per day. Values for normal urinary output may vary slightly between laboratories. A urine output of 500 mL per day is generally considered adequate for normal function.
Oliguria is the output of less than 400ml of urine in a 24 hour period. Although the normal urine output in a day is approximately 1 to 2 liters (30 to 70 fluid ounces), the body only needs to pass out between 300ml to 500ml per day to rid the system of excess solutes and waste products.