Average daily urine volume

• A. 0.5-1 L/day
• B. 1-1.5 L/day
• C. 1.5-2 L/day
• D. 1-2 L/day

Answer: (D)

Normal daily urine volume reflects hydration status and kidney function. In healthy adults, urine output typically falls in the 1 to 2 liters per day range. This span accommodates variations in fluid intake, activity, and individual physiology while staying within what’s considered normal kidney output.

The full 1–2 L/day range best captures the common, real-world variation among healthy individuals. Narrower ranges either miss people who produce more than 1 L or those who produce less than 2 L, which is why they’re less representative of normal daily output. Values much lower than 1 L or higher than 2 L can indicate dehydration, excessive fluid intake, diuretics, diabetes, or other conditions affecting kidneys or osmoregulation.