Urine Output: What's Normal and What's Not?

Urinating is a way for the body to remove toxins and waste from the body. Your body is expected to release a certain amount of urine each day based on the amount of liquid you take in. If your body is releasing more or less urine than it should, this can be a sign that you are suffering from a medical condition that will require attention.

Normal Urine Output

Normal urination is 800-2000 mm each day if you take in around 2 liters of fluid throughout the day. However, normal values can vary in different laboratories. Some testing facilities will use different test samples or measurements to reach their conclusions. Get a urine output test and your doctor will be able to explain the meaning of your results once they arrive.

Decreased Urine Output

Decreased urine output or oliguria is a condition that causes the body to produce less than 400 millimeters of urine a day. As one of the abnormal urine output, this is not to be confused with conditions where people fail to urinate at all, or conditions like anuria when you produce 50 mm of urine or less.


When to See a Doctor

Oliguria is typically caused by another medical condition, so see a doctor for sure. You should know when you started noticing a decrease in urination, particularly if it began suddenly or is getting worse. Also be sure to mention any other symptoms such as fever or pain. You may need to attempt to provide a urine sample so the urine can be analyzed for infectious properties or take blood tests, an abdominal ultrasound, CT or renal scans to determine what is causing your decreased urine production.

Excessive Urine Output

Excessive urine output means that you are producing more than 2.5 liters of urine each day, which is also abnormal urine output. In general, it is considered normal to urinate around 2 liters of liquid every day, but this will vary based on your gender, age and other factors. If this condition appears to continue for a long period of time, you might have an underlying issue that is affecting your overall health.


When to See a Doctor

If you suspect a medical condition is causing your excessive abnormal urine output, you should seek medical attention. Monitor your condition for a few days, and contact your doctor if your condition does not appear to be subsiding.

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