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

Urine output and fluid balance

ml/kg/h with KDIGO oliguria stage and balance in ml, ml/kg and % of body weight

Details

Body weight (baseline weight) (kg)

Weight on admission or before the start of balancing; ml/kg/h and the balance in % of body weight refer to it.

Period (h)

Total intake (enteral + intravenous) (ml)

Urine volume (ml)

Other losses (stool, drains, vomiting) (ml)

Insensible losses (skin, breathing) are not included in this calculator.

Newborn – modified neonatal KDIGO criteria (Selewski 2015, assessment over 24 h)

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)
Neonatal acute kidney injury (Pediatrics 136:e463–e473) – Table 1: Neonatal modified KDIGO criteria Selewski DT, Charlton JR, Jetton JG, et al., 2015. Review article / consensus (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

Urine output and fluid balance: What does this calculator compute?

Calculates from intake, urine volume and other losses over a period the urine output in ml/kg/h (with the KDIGO urine criterion) and the fluid balance in ml, ml/kg and percent of body weight.

Urine output and 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, Charlton JR, Jetton JG, et al.: Neonatal acute kidney injury (Pediatrics 136:e463–e473) – Table 1: Neonatal modified KDIGO criteria (2015); 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)