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Intake And Output Balance Calculator

Work out intake and output balance instantly with clear inputs, formula shown and shareable results.

About Intake And Output Balance Calculator

Adds all recorded intake and all measured output to give the charted fluid balance for the period.

Formula

Charted balance

Balance = (oral + intravenous and enteral intake) - (urine + other measured losses)

Worked example

With the default values below, Intake And Output Balance Calculator returns Fluid balance of 400. Change any input above and every figure here is recalculated in your browser.

Inputs used

Oral intakeaccepts 0–10,000 mL
1,200 mL
Intravenous and enteral intakeaccepts 0–10,000 mL
1,000 mL
Urine outputaccepts 0–10,000 mL
1,500 mL
Drains, vomit and stool lossesaccepts 0–10,000 mL
300 mL

Results

Fluid balance
400 mL
Total intake
2,200 mL
Total measured output
1,800 mL
Direction
Positive balance

Step by step

  1. 1Values used
  2. 2Charted balance
  3. 3Fluid balance= 400 mL
  4. 4Total intake= 2,200 mL
  5. 5Total measured output= 1,800 mL
  6. 6Direction= Positive balance

Assumptions and limits

  • The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to whole numbers, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.

Frequently Asked Questions

Why does the chart often disagree with weight?

Insensible losses and unrecorded intake are missing from the chart, so daily weight is the more reliable measure.

Should flushes be counted?

Yes. Medication diluents and tube flushes add up to several hundred millilitres a day.

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