Calculate nutritional goals

Calculation of energy and protein requirements using established equations

Please choose equation(s)

Multiple selection possible

Harris Benedict
Schofield (WHO)
Ireton Jones





Fat free mass


Activity factor

Immobile, bedridden

Partially mobile, occasional mobilization

Mobile, frequent mobilization; exclusively sedentary with little or no strenuous leisure activity, (e.g., office workers, precision mechanics)

Sedentary work, at times also additional energy expenditure for walking and standing activities, (e.g. laboratory assistants, students, assembly line workers)

Predominantly walking and standing work, (e.g., salesperson, waiter/waitress, mechanic, electrician)

Physically demanding professional work (e.g. construction worker, farmer, forestry worker)


For sports or strenuous leisure activities (30 to 60 minutes, 4 to 5 times per week), 0.3 PAL units can be added per day

Disease factor

Assessment according to situation e.g..
  • Select OP (1 - 1.1)
  • malnutrition (1.3)
  • sepsis (1.1 - 1.4)
  • malabsorption (1.2 - 1.5)
  • hyperthyroidism (1.1 - 2)
  • burns (1.4 - 1.5)
  • polytrauma (1.4 - 2)
Other factors:
  • For each degree of fever (+ 0.1 - 0.2)
  • > 75 years of age (- 0.1)
  • ventilation (- 0.1 - - 0.2)

Severe renal failure without dialysis

GFR < 30ml/min/1.73m2

Spontaneous breathing

State of trauma

State of burn


Equation Resting energy expenditure (REE) Energy requirement Protein requirement
Harris Benedict
Schofield (WHO)
Ireton Jones
Weight adjustment:

Information NutriCalc

Calculation of protein and energy requirements using established formulas

With the present nutrition calculator, individual nutrition goals can be easily calculated online. The calculator presented here is based on the ESPEN guidelines for polymorbid, internal medicine patients and was used in the EFFORT study 1, 2.

- Energy requirement: REE x (AF + DF); REE according to Harris Benedict with adjusted body weight.

- Protein requirement: 1.2 - 1.5 g per kg body weight 0.8 g in severe renal failure without dialysis (GFR < 30 ml/min/1.73 m2)


  1. Gomes F, et al. ESPEN guidelines on nutritional support for polymorbid internal medicine patients. Clin Nutr. 2018;37(1):336-53.
  2. Schuetz P, et al. Individualised nutritional support in medical inpatients at nutritional risk: a randomised clinical trial. Lancet 2019; 393(10188), 2312-2321

List of abbreviations

AF Activity factor
DF Disease factor
EFFORT Effect of Early Nutritional Therapy on Frailty, Functional Outcomes and Recovery of Undernourished Medical Inpatients Trial
ESPEN European Society for Clinical Nutrition and Metabolism
GFR Glomerular filtration rate
REE Resting energy expenditure