This version was machine-translated from German and has not been medically reviewed. The authoritative version is the German version.

Fluid balance

Intake minus output over a period – with urine output in ml/kg/h and balance in % of body weight

Details

Body weight (kg)

Balance period (hours)

Intake

Enteral (oral, tube) (ml)

Intravenous (infusions, medications) (ml)

Other intake (ml)

Output

Urine (ml)

Stool / vomiting (ml)

Drains / tubes / blood loss (ml)

Insensible losses (estimate) (ml)

If included in the balance; otherwise leave empty.

Calculation aid for healthcare professionals: the calculator reproduces what the sources cited assign to the inputs. Clinical assessment and every treatment decision remain with the treating physician. Inputs and results are not stored.

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Sources

KDIGO Clinical Practice Guideline for Acute Kidney Injury (Kidney Int Suppl 2:1–138) – Table 2: Staging of AKI Kidney Disease: Improving Global Outcomes (KDIGO) Acute Kidney Injury Work Group, 2012. Guideline (freely accessible)
Fluid assessment, fluid balance, and fluid overload in sick children: a report from the Pediatric Acute Disease Quality Initiative (ADQI) conference (Pediatr Nephrol 39:955–979) – Table 1: definitions of fluid balance Selewski DT, Barhight MF, Bjornstad EC, Ricci Z, de Sousa Tavares M, Akcan-Arikan A, Goldstein SL, Basu R, Bagshaw SM, 2024. consensus (pediatric ADQI-Konferenz, open access)

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Note

Calculation aid for healthcare professionals. Clinical assessment remains with the treating physician.

Review date of the German original: 2026-11-05 · Methodology

Frequently asked questions

Fluid balance: What does this calculator compute?

Sums intake (enteral, intravenous, other) and output (urine, stool/vomiting, drains, estimated insensible losses) over a period and reports the balance in ml, ml/kg and % of body weight as well as urine output in ml/kg/h.

Fluid balance: Which sources is this calculator based on?

Kidney Disease: Improving Global Outcomes (KDIGO) Acute Kidney Injury Work Group: KDIGO Clinical Practice Guideline for Acute Kidney Injury (Kidney Int Suppl 2:1–138) – Table 2: Staging of AKI (2012); Selewski DT, Barhight MF, Bjornstad EC, Ricci Z, de Sousa Tavares M, Akcan-Arikan A, Goldstein SL, Basu R, Bagshaw SM: Fluid assessment, fluid balance, and fluid overload in sick children: a report from the Pediatric Acute Disease Quality Initiative (ADQI) conference (Pediatr Nephrol 39:955–979) – Table 1: definitions of fluid balance (2024)