Energy Expenditure Calculator

Energy expenditure calculator for clinicians: resting and total daily energy expenditure, weight-based energy estimates with ESPEN factors, and equations for ventilated patients. Made for dietitians, nutrition specialists, intensivists, internists and residents. Sex, age, height and weight are entered once and shared by all three modes. General • Resting energy expenditure by the Mifflin–St Jeor equation • Total daily energy expenditure with the FAO/WHO/UNU physical activity level (PAL) or your own PAL • Resting and activity shares on a single bar • Equations compared on one scale: Harris–Benedict (1919 and the 1984 revision), Katch–McArdle from body fat Clinical nutrition • Energy from body weight: kcal/kg factors from ESPEN guidelines, or your own factor • Actual, ideal (BMI 25) or adjusted weight, chosen by the physician • Protein in grams from the entered g/kg factor • A warning when the chosen setting does not fit the patient's age or BMI ICU and ventilation • Energy expenditure from ventilator VCO₂ • Penn State 2003b and 2010, with the version picked by age and BMI • Ireton-Jones for ventilated and spontaneously breathing patients • Methods compared on one scale, with a warning when VCO₂ differs widely from the equation Made for daily work • Results update as you type • The current result stays under the title, with a button to jump to it • BMI with its WHO category • Input checks: implausible values are not accepted • Ready-made summary: copy with one tap or send to a messenger • Reference tab: all equations, factors and links to sources • Light and dark theme Sources • Mifflin MD et al. Am J Clin Nutr, 1990 • Harris JA, Benedict FG, 1919; Roza AM, Shizgal HM, 1984 • FAO/WHO/UNU. Human energy requirements, 2004 • Frankenfield D et al. Penn State, JPEN 2004 and 2011 • Ireton-Jones C, Jones JD. Nutr Clin Pract, 2002 • ESPEN: intensive care (2019), geriatrics (2019), polymorbid medical inpatients (2024) Equations give an estimate; indirect calorimetry is the reference method. Entered values stay on the device and are never sent anywhere. No patient name or other personal details are requested. The app calculates energy expenditure from published equations and factors. It does not select therapy and gives no treatment or feeding recommendations; results must be interpreted by a physician. This app is not a medical device and does not diagnose, treat, cure, or prevent any medical condition. Consult a healthcare professional for medical advice, diagnosis, or treatment.

Version 3.0: the app is now called Energy Expenditure Calculator and has been rebuilt: three modes (general, clinical nutrition with ESPEN factors, ICU and ventilation), Penn State, Ireton-Jones and VCO₂, equation comparison, a ready summary, a reference with sources, a new design, dark theme and English.