iPhone Screenshots


Calc Rx is an outpatient prescription calculator that makes determining dispense quantities and billable days supply fast and effortless. Simply tap in the sig (directions) and Calc Rx does the rest. Complex steroid tapers, warfarin regimens, ear/eye drops, liquids, and more are all a snap. Pharmacists, pharmacy techs, nurses, and prescribers will be amazed by the time saved by this useful little app!


*5 calculators specific to common outpatient dosage forms and regimens (tablets/capsules, oral liquids, ear/eye drops, insulin, and warfarin)
*fully equipped standard calculator with complete history display
*automatic quantity calculations for 30 and 90 day supplies
*unlimited undo for precision editing
*future fill date calculator

Check out my other apps RxOrange and OTC Assistant!

What’s New

Version 1.0.4

Updates for compatibility with iOS 13 and above. Better support for darkmode. Minor bug fixes to the user experience.

Ratings and Reviews

4.9 out of 5
9 Ratings

9 Ratings

EMILY6192 ,

Essential app. Does just what it needs to.

Seems to be the only app of its kind out there (particularly for calculating next fill date for controls and narcs). Love it! Only gripe is that when you drag icons to reorganize the tabs, the organization preferences don't save for next time you open the app. Anyway, this app is a must have for community pharmacists wanting to double check your work.

Pery Tylr ,

Very helpful with complex SIGs

This app can be very helpful to determine the day-supply of medications. Really like that it includes drops and liquids.

However, the reason I rated this app with 4 stars and not 5, it doesn’t include a dedicated inhaler or allergy-spray day-supply feature. Inhalers and allergy sprays (like fluticasone) can require more effort to determine the correct day-supply. Taking the SIG and then having to determine how much medicine is contained within the product can take up more time.

Luckily, most inhalers and other have meter-dosing or a certain number of puffs/sprays, so the calculations are more straight forward, but in the event that is not given a feature that could include that would be very helpful.

JanelleTurner ,


This app helps you calculate quickly. I find very helpful when I can't seem to think fast enough. The only downside is the eye drops can only be 15gts or 20gts. At work we go by 16gts. Other than that this app is a great help.

App Privacy

The developer, Dabbling Badger LLC, 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.

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