Nutrition Support
Every nutrition support calculator on CalcEngines — each with its formula, a worked example, the standard it follows and the assumptions it makes.
5 calculators in this section
- Adult Fluid Requirement Calculator (mL/day)A baseline maintenance volume for an adult by three named, separately sourced methods — mL per kg, 1 mL per kcal, and the tiered weight method — with pyrexia and each measured loss added as its own visible line, so you can read off what contributed what. Adults only; the paediatric case belongs to the Holliday-Segar page in the medical set.
- Energy Requirement Calculator (Mifflin, Harris-Benedict, Schofield)What five published predictive equations yield in kcal/day for one set of inputs — Mifflin-St Jeor 1990, the 1919 Harris-Benedict original, the Roza & Shizgal 1984 revision, Schofield 1985 and the Henry 2005 Oxford equations — shown side by side so the disagreement between them is visible, with the activity and stress multipliers applied as separate, individually sourced steps.
- Enteral Feed Rate Calculator (mL per hour)Millilitres an hour for a tube feed, from the energy target, the feed's energy density and the feeding schedule — with the daily volume, the water the feed actually contributes, and the protein it delivers. A rest period changes the rate by exactly the ratio of hours and not the volume, and the page shows that explicitly.
- Parenteral Nutrition Macronutrient CalculatorEnergy from each macronutrient in a parenteral nutrition bag, the non-protein energy, and the nitrogen-to-energy ratio in both of the conventions it gets quoted in. Dextrose is costed at 3.4 kcal/g because intravenous dextrose is the monohydrate, and the page shows what the 4.0 kcal/g error would have cost you. Lipid can be entered as grams of oil or as millilitres of emulsion, which are not the same thing.
- Protein Requirement Calculator (g per day)Grams of protein a day from the published g/kg/day range for a clinical condition, on a weight basis you choose and declare. Prints the bottom of the range, the top, the midpoint and the nitrogen each works out to — because the literature states a range and a page that prints one number hides that. The restricted renal targets and the raised renal-replacement targets are separate, labelled rows.