billycalc

Urine Output

Urine Output: calculated with the published clinical method, with result interpretation. A reference tool that does not replace a doctor's advice.

ℹ Reference calculation based on the published method. It does not replace a clinical examination or a doctor's decision.

Urine Output

Urine volumemL
Weightkg
Collection periodh
Urine output rate
0.714286mL/kg/h
For children, the lower limit of normal is 1 mL/kg/hUrine Output: calculated with the published clinical method, with result interpretation. A reference tool that does not replace a doctor's advice.
Assessment
Normal for adults (≥ 0.5 mL/kg/h)
Hourly urine output
50mL/h
Converted to 24 hours
1200mL

More about: Urine Output

What it calculates

The “Urine Output” calculator computes Urine output rate in mL/kg/h from 3 parameters: urine volume (mL), weight (kg), collection period (h).

Used by professionals and patients to assess health metrics, dosages, and risks.

Example calculation

With parameters Urine volume = 400 mL, Weight = 70 kg, Collection period = 8 h the result is 0.7143 mL/kg/h (For children, the lower limit of normal is 1 mL/kg/h).

How to use

  1. Enter urine volume, weight and collection period — each field above is adjustable with a slider.
  2. Urine output rate (mL/kg/h) is calculated automatically as you type.
  3. Check the worked example below to see the formula applied to real numbers.
  4. Copy the result or bookmark this calculator.

Related calculators

FAQ

How is BMI calculated?
BMI = weight (kg) / height (m)². Example: 70 kg / (1.75 m)² = 22.9. The WHO normal range is 18.5–24.9; below that is underweight, 25–29.9 is overweight, and 30+ is obese.
Is BMI accurate for everyone?
No. BMI does not distinguish muscle from fat, so athletes may show a high BMI with low body fat. It is also less reliable for teenagers, pregnant people, older adults, and very tall or short individuals.
What are the BMI categories?
Underweight: below 18.5. Normal: 18.5–24.9. Overweight: 25–29.9. Obese class I: 30–34.9; class II: 35–39.9; class III: 40+.
What is a better measure than BMI?
Body fat percentage, waist-to-height ratio (aim for under 0.5), and waist circumference give a clearer picture of health than BMI alone.

More calculators in this category

Explore related free tools

CIWA Score (Alcohol Withdrawal)DUDITFagerström Test (Nicotine)Finnegan Score (NAS)HSI (Heaviness of Smoking)Pack-YearRecovery After Quitting SmokingCAGE-AIDDAST-10ACR (Albumin-Creatinine Ratio)Bladder VolumeBUN / Creatinine Ratio