iPhone Screenshots


RTcalc has an interface built with speed in mind. You can quickly enter and view data without the need to click on input boxes, or switch between multiple screens. RTcalc features a "Stay in Place" interface similar to a conventional calculator. Speed of entry is achieved by efficient use of three menus, a single input box, and a custom keyboard. RTcalc improves each year with feedback and suggestions from professional; Doctors, RN's RT's, and students.

Main Features:

* Calculator like display and functionality.
* A single input box to enter data.
* Easy one handed usage.
* Customized Keyboard for optimal performance.
* Toolbar guides your actions.
* Advanced information for each calculator.
* Tools designed for seasoned and student RT's.
* In-App email feedback submission.

* licensure, CEU, and educational web links.
See RT Education Under: (RT CEU Info by state)

+ A-a Gradient
+ Alveloar Gas Exchange
+ Apgar Score
+ Arterial Oxygen Content
+ Bicarbonate Deficit
+ Body Parameters
+ Bohr Dead Space
+ Cardiac Surgical ICU Score
+ Cardiac Index-Output
+ Desired FiO2 or PaO2,
+ EDi Catheter
+ Henderson HasselBalch
+ In Flight PAO2 Estimation
+ Kidney Function
+ Left Ventricular S.W.I
+ Lung Compliance
+ Mean Airway Pressure
+ O2 Tank Time
+ Oxygen Consumption
+ Oxygen Delivery
+ Oxygen Index
+ Oxygenation Parameters
+ PAO2 : FIO2 Ratio
+ Predicted PEFR-FEV1
+ Pulmonary Shunt
+ Pulmo-Vascular Resistance
+ RT CEU Info by State
+ RT Treatments
+ System-Vascular Resistance
+ Tidal Volume ARDS
+ Unit Converter
+ Vent Desired PCO2
+ Venous Oxygen Content
+ Vent Weaning RSBI-rate
+ Ventilation Index

What's New

Version 3.1

RTcalc has discontinued several calculations since the last update. Calculations removed were: ABG Interpreter, Corrected Tidal Volume, Tube Size Endotracheal, Epoprostenol Inf Rate, Servanta Dosing and Vent Settings. I am sorry for any inconvenience this may cause.

Ratings and Reviews

4.8 out of 5

6 Ratings

6 Ratings

Attention to Details

Michael Mcpeck

Overall, this is a great calculator for RTs but it has a few shortcomings that can be easily fixed in a future update:

Fahrenheit is spelled wrong ("Farenheight").

Abbreviation for milliliters (mL) is not consistent throughout (sometimes it's "ml").

Inconsistency between FIO2 and FiO2.

Perhaps there ought to be a regular calculator included in the "Tools" section so you don't have to leave the app to do other math.

Why is A-a Gradient, Arterial Oxygen Content and Bicarbonate Deficit in the "Cardiac" section?

I didn't go through all the "RT Medications" with a fine-tooth comb, but I did see a number of errors when I glanced through quickly:

Albuterol Nebulized: is listed as 2.5 mg / 3 mL of 0.5% solution. That should be 0.083% solution.

Brovana Nebulized is listed as "2 mL in 2.1 mL saline." Should be 15 mcg in 2.1 mL saline.

Coly-Mycin is listed as an "antibacterial-corticosteroid." It is not a corticosteroid. It is an antibiotic.

Pulmicort (budesonide) does not include Pulmicort Respules, inhalation suspension for nebulization.

When I get a chance, I'll check out the RT Meds more thoroughly.

None of these are show-stoppers and should not prevent anyone who needs the app from buying it. It's still worth the money and I hope the developer continues to fix the small problems and add additional information and calculations.

Pediatric/Neonatal transport RT


Great app! Being a transport RT having to think quick on your feet is standard practice. The app has a few "double checks" to look at quickly verifying my math calcs. I like the APGAR calc along with O2 tank calc with timer. Will play with it on my next transport. Keep adding to this app! I would suggest adding normal Vital signs per age group and maybe RSI drugs and calculations by age. Broslow tape by color perhaps? Thanx for building this app! Cheers!

One of the best RT apps I have experienced

Brian Walsh

This is a great app for new and experienced RTs. While not as comprehensive has I would like to see, this is one of the best starts. I look forward to seeing this app grow with input from the RT community. This is not a paid endorsement.


Ronnald Grant
1.8 MB
Requires iOS 8.4 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2012 Ronnald Grant


  • Family Sharing

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

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