What is the typical adult hourly urine output range?

• A. About 0.5 mL/kg/hour (roughly 30-50 mL/hour; minimum around 30 mL/hour)
• B. About 2 mL/kg/hour
• C. About 0.1 mL/kg/hour
• D. About 100 mL/hour

Answer: (A)

Normal adult urine output is about 0.5 mL per kilogram of body weight per hour. That means a person weighing around 60 kg would produce roughly 30 mL per hour, while someone about 80 kg would be closer to 40 mL per hour. In general, the typical range is about 30–50 mL per hour, which corresponds to 0.5 mL/kg/hour. This baseline helps clinicians assess kidney perfusion; urine output falling well below this rate can indicate hypoperfusion or renal dysfunction (oliguria). The other options describe outputs that are either much higher or much lower than the usual range, so they don’t match the common adult pattern.