1. What is 24 Hour Urine Output?

The 24-hour urine output measurement is a clinical assessment of kidney function and fluid balance. It measures the total volume of urine produced over a 24-hour period and calculates the average hourly output.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

• Total Urine Volume — Measured in milliliters (mL) collected over 24 hours
• 24 — Number of hours in the collection period

3. Importance of Urine Output Monitoring

Details: Monitoring urine output helps assess kidney function, hydration status, and response to treatment. Normal hourly output is typically 0.5-1.5 mL/kg/hour.

4. Using the Calculator

Tips: Enter the total urine volume collected over 24 hours in milliliters. The calculator will compute the average hourly output.

5. Frequently Asked Questions (FAQ)

Q1: What is a normal 24-hour urine output?
A: Normal range is typically 800-2000 mL per 24 hours (about 0.5-1.5 mL/kg/hour).

Q2: What does oliguria mean?
A: Oliguria is urine output <400 mL/24h (<17 mL/h), often indicating kidney dysfunction or dehydration.

Q3: How is 24-hour urine collected?
A: Collection starts after discarding the first morning void, then all urine is collected for next 24 hours including first void next morning.

Q4: What factors affect urine output?
A: Fluid intake, medications (especially diuretics), kidney function, hydration status, and certain medical conditions.

Q5: When should I be concerned about urine output?
A: Consult a doctor if output is <400 mL/24h or >3000 mL/24h without increased fluid intake.