Nursing guide
Exam-focused context for this calculator. For clinical care, follow orders, policies, and local protocols.
The Pediatric TFI (total fluid intake) calculator totals a child's intake and expresses it as mL, mL/kg, and mL/kg/hr, with optional output for net balance and urine output mL/kg/hr. Pediatric fluid needs are weight-sensitive, so results are shown per kilogram.
This is a study tool for nursing education and exam preparation only. It must not be used to make real patient-care fluid decisions, and it does not recommend a fluid prescription.
Weight: kg = lb ÷ 2.2. Total intake = sum of all entered sources. mL/kg = total intake ÷ weight (kg). mL/kg/hr = total intake ÷ weight (kg) ÷ hours. Urine mL/kg/hr = urine output ÷ weight (kg) ÷ hours. Net balance = intake − output.
A 10 kg child receives 400 mL total intake over 8 hours.
TFI stands for total fluid intake, the sum of all fluids a child receives over a period, often expressed per kilogram of body weight because pediatric fluid needs are weight-sensitive.
Divide the total intake in millilitres by the weight in kilograms and then by the number of hours: mL/kg/hr = total intake ÷ weight (kg) ÷ hours.
Divide urine output in millilitres by the weight in kilograms and then by hours: urine mL/kg/hr = urine ÷ weight (kg) ÷ hours.
Children vary widely in size, so fluid intake and output are interpreted per kilogram. Convert pounds to kilograms first using kg = lb ÷ 2.2.
No. It is for nursing education and exam preparation only. Real pediatric fluid decisions must follow provider orders, weight-based protocols, assessment, and policy.
These answers are for nursing education and exam practice only and do not provide patient-specific medical advice.
Intake sources (mL)
Safety
For nursing education and exam preparation only. Pediatric fluid intake calculations must be verified with provider orders, institutional policy, weight-based protocols, clinical assessment, and pharmacist/provider guidance. Do not use this tool to make real patient-care decisions.
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