# Calculate by QxMD — Medical Calculator

> Medical calculator and decision support tool for clinicians. (iPhone/iPad app by WebMD.)

- Source: https://appshunter.io/ios/app/calculate-by-qxmd/id361811483 (this page in markdown: same URL + `.md`)
- Developer: [WebMD](https://appshunter.io/developer/295076332)
- Category: Medical
- Price: Free
- Rating: 4.80/5 from 5,100 App Store ratings · 776 written reviews indexed
- Age rating: 17+
- Requires: iOS 16.0 · 118 MB
- Languages: French (France), German (Germany), American English, European Spanish, Italian, European Portuguese
- Released: 2010-03-20
- Data updated: 2026-08-26
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/calculate-by-qxmd/id361811483/reviews.md

## What is Calculate by QxMD?

From the developer of 'Read by QxMD', 'The ECG Guide' and 'Pedi STAT' comes 'Calculate', a next-generation clinical calculator and decision support tool, freely available to the medical community.

"We recommend medical users try the free Calculate by QxMD first..."
-from iMedicalApps review "The best free Medical Calculator apps for the iPhone"

'Calculate' highlights tools which impact clinical practice either by simplifying diagnosis, clarifying treatment options or displaying prognosis.

Helping you make decisions, not just calculate numbers...

Features

• Developed by a collaboration of clinician experts from diverse backgrounds
• Point-of-care tools in the areas of cardiology, internal medicine, primary care, nephrology, hematology, hepatology, gastroenterology, emergency medicine, oncology, orthopedics, critical care/ICU, ENT, radiology, rheumatology, mental health, respirology, neurology, pediatrics, infectious disease, neurosurgery, general surgery, vascular surgery, and obstetrics.
• Converts recent research publications into practical handheld tools - knowledge translation at its best 
• Automatically adapts to your clinical practice
• Unique ‘Question Flow’ technology gets you answers, fast
• Detailed references with PubMed & Read integration
• Comprehensive and insightful results
• Elegant design and intuitive interface
• SI and Imperial units

More than 200 unique calculators and decision support tools

While too extensive to list them all, here is a small sampling of included content:

Guide treatment

• Determine cardiovascular risk using ACC/AHA, Framingham, Gupta and VQI Cardiac Risk Index
• CHADS2 & CHA2DS2-VASc to guide treatment in atrial fibrillation
• Understand bleeding risk in atrial fibrillation using HAS-BLED & OBRI
• TIMI risk score in ACS
• CIWA in alcohol withdrawal
• Rule of 9s & Parkland formula in burns
• Water deficit in hypernatremia 
• Timing of surgery with Aortic Stenosis Risk Score
• Risk stratify pneumonia (CURB-65, PORT)
• NIH Stroke Scale in acute stroke
• Imaging in possible subarachnoid hemorrhage with Ottawa SAH Rule

Determine Prognosis

• Cirrhosis (MELD, Child-Pugh)
• Chronic Kidney Disease (Kidney Failure Risk Equation)
• Heart failure
• Lymphoma (NCCN-IPI, IPI24, R-IPI)
• Myelodysplastic Syndrome (IPSS-R, WPSS)
• Myeloma (ISS, R-ISS)
• Hemodialysis
• COPD (Bode)
• Pancreatitis (BISAP, Ranson's)
• Cardiac surgery (Euroscore II, Cleveland Clinic, Mehta)
• Critical care (APACHE II, SOFA)
• Neurologic outcome (DRAGON, CAM-ICU, modified Rankin, FOUR score, Hunt & Hess)

Calculate

• Ideal body weight, BMI and BSA
• Due date and gestational age
• Extensive formula used in echocardiography and invasive hemodynamic monitoring
• Kt/V in dialysis patients
• eGFR with CKD-EPI, MDRD & Schwartz
• A-a gradient

Classify

• Angina (CCS)
• Congestive heart failure (NYHA)

Screen

• Diabetes
• Breast cancer

Reduce and predict perioperative complications

• WHO Surgical Safety Checklist
• Predictive models for cardiac surgery, vascular surgery and coronary angiography
• Postoperative Respiratory Failure Risk score

Manage

• Head, neck, ankle and knee injuries (NEXUS, Ottawa ankle/knee, Canadian C-spine and CT head rules)
• DVT and PE (PERC, Wells, PESI)
• Pulmonary nodules
• TIA (ABCD2)

Stage

• Lung cancer
• Renal cell carcinoma
• Head & neck cancers

Understand

• TTKG in hypokalemia and hyperkalemia
• Dermatomes

Diagnose

• Heparin Induced Thrombocytopenia
• Infective Endocarditis
• ARDS
• Autoimmune Hepatitis
• Sleep disorder (Epworth Sleepiness Scale)

And much, much more...

Researchers, contact us to see your research in our app at contact@qxmd.com

Founded my medical professionals, QxMD Software is dedicated to creating high quality, point-of-care tools for practicing health care professionals. Recognized as a leading developer of free medical software for mobile devices, QxMD develops content in cooperation with expert physicians from their respective fields.

## Key features

- Over 200 medical calculators
- Clinical decision support tools
- Cardiology, internal medicine, and more
- Knowledge translation from research
- Question Flow technology
- PubMed & Read integration
- SI and Imperial units

## What do users think of Calculate by QxMD?

Overall sentiment: positive

**Pros**

- ⭐ Excellent app
- 📋 Comprehensive set of calculators
- 🔍 Helpful references and explanations
- 🔧 Useful for daily practice
- 🧠 Great for students and trainees

**Cons**

- 🐛 App freezes or crashes
- 🔍 Some calculators not working
- 🔑 Repeated login requests
- 🔍 Outdated or missing features
- 🚫 Ads can be intrusive

**Commonly reported bugs**

- App freezes when using multiple calculators
- Unable to add items to favorites list
- Unable to see calculation results after input
- App crashes on startup without internet connection
- Landscape mode not working on iPad

**Most requested features**

- Dark mode option
- Ability to save/favorite frequently used calculators
- Integration with electronic health records
- Metric to imperial unit conversion
- More specialized calculators (e.g., opioid equivalence, pediatric BP)

## Recent user reviews (10 of 776)

All indexed reviews: https://appshunter.io/ios/app/calculate-by-qxmd/id361811483/reviews.md

### 2/5 — Era bom…

*2026-01-17*

Antes era muito bom, mas de um tempo pra cá, toda vez que volta pr menu inicial ou faz qualquer coisa, aparece “atualizando” e demora para voltar. Perde-se muito tempo. E é totalmente desnecessário! Não precisa ficar atualizando a cada poucos segundos!

### 5/5 — Reseña

*2024-09-15, version 9.2.1*

Excelente sito de búsqueda de literatura médica

### 3/5 — Only one calc at a time

*2024-04-15, version 9.2.1*

Great resource, but app freezes if you use the app for more than one calculator. Get out of the app between each calculation.

### 1/5 — not working

*2024-03-25, version 9.2.1*

not working in ipad air

### 2/5 — Fix this please!!!!!

*2024-03-19, version 9.2.1*

Will not allow you to add anything to the favorite list.

### 1/5 — Not great

*2023-10-12, version 9.2.1*

Results are not able to be seen after filling out the forms. I have tried different forms with the same result. Even while typing the review, I cannot see what I am typing. I

### 1/5 — Excellent until now

*2023-08-17, version 9.2.1*

I have a long list of favorites. However, now, something is wrong, “bugs” the app freezes at the end of questions. It happens on all the decisions trees.

### 5/5 — Very good

*2023-07-28, version 9.2.1*

Usefull and good design program necessary for All psyhcians

### 1/5 — Bugs!

*2023-07-02, version 9.2.1*

App freezes just when a questionnaire has been completed

### 5/5 — Se cierra la aplicación

*2023-06-08, version 9.2.1*

Realizó el cálculo, se congela la pantalla y no da el resultado y se cierra

## Frequently asked questions about Calculate by QxMD

### What does Calculate by QxMD do?

Calculate by QxMD is a clinical calculator and decision support tool designed for medical professionals. It offers over 200 calculators and tools to assist with diagnosis, clarifying treatment options, and displaying prognosis across a wide range of medical specialties.

### What are the key features of this app?

Key features include over 200 unique calculators and decision support tools developed by clinician experts, covering areas like cardiology, internal medicine, and critical care. It also boasts 'Question Flow' technology for fast answers, detailed references with PubMed and Read integration, and an intuitive interface.

### Is Calculate by QxMD free to use?

Yes, Calculate by QxMD is freely available to the medical community. While the app itself is free, it does have in-app purchases, suggesting that some advanced features or content might require additional payment.

### What medical specialties are covered by the app?

The app covers a vast array of medical specialties, including cardiology, internal medicine, primary care, nephrology, hematology, gastroenterology, emergency medicine, oncology, orthopedics, critical care/ICU, ENT, radiology, rheumatology, mental health, respirology, neurology, pediatrics, infectious disease, neurosurgery, general surgery, vascular surgery, and obstetrics.

### How does the app help with clinical decisions?

The app helps clinicians make decisions by providing tools that simplify diagnosis, clarify treatment options, and display prognosis. It converts recent research into practical handheld tools and adapts to your clinical practice, offering comprehensive and insightful results to guide patient care.

## Version history (last 5 releases)

### 9.5 — 2025-12-19

Bug Fixes

### 9.4.0 — 2024-11-04

Bug fixes.

### 9.3.0 — 2024-09-26

Bug fixes.

### 9.2.1 — 2022-08-23

In this version we continued fixing minor bugs, and enhanced the app's performance.

Have questions or concerns? Send us an email at support@QxMD.com.

### 9.2.0 — 2022-05-30

In this version we continued fixing minor bugs, and enhanced the app's performance.

Have questions or concerns? Send us an email at support@QxMD.com.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-26.*