Quick guide
How to use this calculator
- Use the labels and unit notes to enter the requested measurement, date, time, or observation exactly as recorded.
- Check the visible method, population, and unit basis before using the result; switch modes rather than converting values mentally.
- Read the calculation audit and limitations together. The result supports measurement or tracking and does not replace diagnosis, treatment, or urgent medical assessment.
Calculation method
How the multi-period fluid balance calculator works
Period balance = intake - output; cumulative balance = sum of period balances.
The result describes only the entered record. Positive and negative differences are arithmetic directions, not diagnoses or automatic targets.
Worked example
Multi-Period Fluid Balance example
Rows 1000,800 and 900,1100 produce period balances +200 and -200 mL, cumulative 0 mL.
Period balance = intake - output; cumulative balance = sum of period balances.
Supported inputs
Precision and limits
Supported purpose
Use complete measurements from the same period and matching units. This calculator cannot infer unmeasured losses, hydration status, or an appropriate intake for a person.
Measurement quality
The output is only as reliable as the entered measurement, device, timing, units, and applicable reference population. Recheck unexpected values against the original record.
Clinical boundary
This calculator does not diagnose a condition, choose treatment, change medication, or determine that an urgent symptom is safe to monitor at home. Contact an appropriate health professional or local emergency service when the situation may be urgent.
Privacy
Entered health values and results stay in this browser tab. They are not placed in URLs, analytics, logs, local storage, session replay, or a cloud record by this calculator.
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