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Calcimator

Enteral Feeding Calculator

Calculate tube feeding rate, daily volume, and protein delivery from formula specifications. Includes Holliday-Segar fluid needs and free water flush requirements.

Inputs

%

Results

Feeding rate (mL/hr)

90

Daily volume (mL/day)1,800
Protein delivered (g/day)72
Protein per kg (g/kg/day)1.03
Calories per kg (kcal/kg/day)25.7
Holliday-Segar fluid needs (mL/day)2,500
Water from formula (mL)1,476
Free water flush needed (mL)1,024
How to Use This Calculator
  1. Enter the patient's weight in kg.
  2. Set the caloric goal in kcal/day as prescribed.
  3. Enter the formula density (kcal/mL) from the product label.
  4. Input the protein content per liter of formula.
  5. Review the daily volume (mL), hourly rate, and protein delivery to verify adequacy.

How the result changes with Formula density (kcal/mL)

Formula density (kcal/mL)Feeding rate (mL/hr)
0.75120
1.3865.2
2.1342.3
2.7532.7

What each input means

Weight (kg)
Patient body weight in kilograms.
Caloric goal (kcal/day)
Target daily calorie delivery.
Formula density (kcal/mL)
Caloric density: 1.0 standard, 1.5 high-cal, 2.0 renal/concentrated.
Formula protein (g/L)
Grams of protein per liter of formula.
Feeding hours per day
Hours of feeding per day (continuous = 20-24, bolus = fewer).
Formula water content (%)
Percentage of formula that is water (typically 80-85%).

What each result means

Feeding rate (mL/hr)
Pump rate for the specified feeding duration.
Daily volume (mL/day)
Total formula volume to deliver caloric goal.
Protein delivered (g/day)
Total protein from the formula at this volume.
Protein per kg (g/kg/day)
Protein delivery relative to body weight.
Calories per kg (kcal/kg/day)
Caloric delivery relative to body weight.
Holliday-Segar fluid needs (mL/day)
Estimated daily fluid requirement.
Water from formula (mL)
Free water provided by the formula.
Free water flush needed (mL)
Additional water flushes needed to meet fluid requirements.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Weight (kg) = 70, Caloric goal (kcal/day) = 1800, Formula density (kcal/mL) = 1, Formula protein (g/L) = 40 = 6 input(s) provided
  2. Calculate Feeding rate
    Feeding rate = dailyVolumeMl / feedingHours
    90 = 90
  3. Calculate Daily volume
    Daily volume = caloricGoal / formulaDensity
    1800 = 1800
  4. Calculate Protein delivered
    Protein delivered = (dailyVolumeMl / 1000) * proteinPerLiter
    72 = 72

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