// multi-utility computation suite · offline · instant · precise
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health.fluid-therapy-rate Calculator
Calculates hourly fluid therapy rate from 4-2-1 rule weight-based maintenance, deficit replacement, and ongoing losses. The Holliday-Segar 4-2-1 rule is the standard starting point for paediatric maintenance fluid calculation.
Inputs
Body Weight Kg
Body or object weight. For health calculators, usually in kg or lbs.
Dehydration Pct
Reference formula or conversion factor shown for context.
Maintenance Ml Kg Day
Amount per unit of time or per unit quantity. Check the denominator before interpreting.
Replacement Hours
Reference formula or conversion factor shown for context.
Results
total IV rate (mL/hr)
The combined total across all inputs and components.
fluid deficit (mL)
Reference formula or conversion factor shown for context.
replacement rate (mL/hr)
The value at the specified point or condition.
maintenance rate (mL/hr)
The value at the specified point or condition.
reassess
Reference formula or conversion factor shown for context.