Intake & Output Balance Calculator
Calculate 24-hour fluid balance from all intake sources (oral, IV, other) and output sources (urine, drains, other).
Medical Disclaimer
This calculator is for informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making decisions about your health. Never disregard professional medical advice or delay seeking it because of results from this tool.
Inputs
Results
Net Balance
500 mL
Balance Per Hour
20.8 mL/hr
How to Use This Calculator
- Enter all intake sources: oral intake (mL), IV fluids (mL), and other intake (mL).
- Enter all output sources: urine output (mL), drain output (mL), and other output (mL).
- Read the fluid balance (mL): positive = net fluid retention, negative = net fluid loss.
- Review 24-hour totals and running balance to identify trends in fluid status.
- Document results in the medical record and report significant imbalances per facility protocol.
How the result changes with Urine Output
| Urine Output | Net Balance | Balance Per Hour |
|---|---|---|
| 1,000 | 1,300 mL | 54.2 mL/hr |
| 3,500 | -1,200 mL | -50 mL/hr |
| 6,500 | -4,200 mL | -175 mL/hr |
| 9,000 | -6,700 mL | -279.2 mL/hr |
What each input means
- Oral Intake
- Total oral fluid intake over 24 hours in milliliters (water, juice, soup, etc.).
- IV Fluids
- Total intravenous fluid intake over 24 hours in milliliters.
- Other Intake
- Other fluid intake (tube feeds, blood products, irrigation) in mL.
- Urine Output
- Total urine output over 24 hours in milliliters.
- Drain Output
- Total output from surgical drains, NG tube, chest tube, etc. in mL.
- Other Output
- Other fluid losses (emesis, wound drainage, stool, insensible losses) in mL.
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersOral Intake = 1500, IV Fluids = 1000, Other Intake = 0, Urine Output = 1800 = 6 input(s) provided
- Calculate Net BalanceNet Balance500 = 500
- Calculate Balance Per HourBalance Per Hour20.8 = 20.8
- Calculate Total IntakeTotal Intake2500 = 2500
- Calculate Total OutputTotal Output2000 = 2000
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