Informationen 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