IV Therapy
Maintenance fluids, deficit replacement, and fluid resuscitation calculators.
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Maintenance Fluid Calculator
Calculate hourly and daily maintenance fluids using the 4-2-1 rule.
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Fluid Deficit Calculator
Estimate fluid deficit based on pre-illness weight or clinical signs.
1 minCalculate →
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Blood Volume Calculator
Calculate estimated total blood volume using Nadler's equation.
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Clinical Overview
Fluid management is fundamental to inpatient care. These tools help calculate daily maintenance requirements, correct fluid deficits, and guide resuscitation strategies.
Common Use Cases
- •Calculating daily maintenance fluids (4-2-1 rule)
- •Estimating fluid deficit in dehydration
- •Burn resuscitation (Parkland formula)
Clinical Pearls
The 4-2-1 Rule
4 mL/kg/hr for the first 10 kg, 2 mL/kg/hr for the next 10 kg, and 1 mL/kg/hr for every kg above 20 kg. For adults >20kg, a shortcut is Weight (kg) + 40 = Hourly Rate (mL/hr).