Registered Dietitian Calculator (iOS Version 10.08.19)

Registered Dietitian Calculator (iOS Version 10.08.19) -Synopsis of the App: Registered Dietitian Calculator is an enteral and parenteral nutrition solution calculator designed for registered dietitian nutritionists in clinical practice.

Price and Platform: Free. Apple and Android

RDN Score: 4/5


  • Designed by a clinical dietitian for clinical dietitians.
  • Access key data entry fields from the home screen.
  • Customize the app with preferred settings per personal practice and an institution’s formulary and guidelines.
  • Calculate estimated needs and bolus, continuous enteral feeds as well as 2:1 or 3:1 parenteral solutions.
  • Select preferred predictive equations from Mifflin-St. Jeor, Penn State, Harris-Benedict as well as kCal/kg per ideal, actual and adjusted body weight. Set preferences for fluid need calculations using Holliday-Segar and ml/kg ideal and actual body weight.
  • Set and save user preferences to include imperial and metric or metric units only.
  • Calculates estimated calories, protein and fluids from the same screen.
  • The app has a simple design, making it easy to use.


  • Users must pay to unlock the full enteral and parenteral features.
  • There are similar tools available at no cost.
  • Formatting is a little off center (based on the phone used during this review).

Bottom Line: Registered Dietitian Calculator puts many of clinical dietitians’ calculating tools within easy reach.

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Marisa Moore
Marisa Moore, MBA, RDN, LD, is based in Atlanta and specializes in culinary nutrition, communications and consulting. She blogs at Follow her on Instagram and Twitter.