RD Calculator is the ultimate tool designed by a clinical dietitian for clinical dietitians. RD Calculator is customizable to comply with your institution’s policies and formulary and will make quick work of calculating estimated needs. Using the enteral and parenteral calculators will save several minutes per patient while providing consistent results based on the input you provide.


- From the User Preferences screen you can select which predictive equations you commonly use, enter your enteral formulary, modulars, and parenteral stock solutions.
- Calculate estimated needs for kcal, protein, and fluids all from the same screen.
- Quickly calculate continuous or bolus enteral feeds with modulars and water flushes.
- Calculate 2:1 or 3:1 parenteral solutions. RD Calculator will calculate kcal, kcal/kg, g amino acid/kg, GIR, % lipid, osmolarity, minimum volume required for volume restricted patients, mEq Na/L, and % normal saline equivalent. There is also a fine adjustment function for osmolarity of PPN.

Free version includes:
- Estimated Needs Calculator

Premium version adds:
- Enteral and Parenteral Calculators with customizable formulary

What’s New

Version 3949.01.20 Code optimization and user interface improvements to Estimated Needs. User applied Estimated Need stress factors are persistent until cleared via new patient selection or clear screen. No changes to formulas.

Ratings and Reviews

4.5 out of 5
2 Ratings

2 Ratings

%skyling% ,

Nice for on the go calculations!

Works great for simple calculations and analyzing PN formulations. Appreciate the inclusion of osmolarity of final solutions. Enteral calculator would be nicer if the major brands were preloaded into the app.

Danielle Bourque ,


Excellent app! I use the PN calculator daily.
Love the EN calculator as well! I would 100% to other RDs.

App Privacy

The developer, Darren Woodman, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

You May Also Like