• MDCalc Medical Calculator 1
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MDCalc Medical Calculator

Join the 1 million+ medical professionals who use MDCalc daily to support clinical decision making at the bedside. Since 2005, MDCalc has been the leading medical reference for the most relevant, up-to-date and widely-used clinical calculators that support evidence-based patient care. Registration is free and takes <30 seconds for full, unlimited access.

MDCalc clinical decision support is created exclusively by board-certified physicians for use by physicians, physician assistants, nurse practitioners, pharmacists, and medical students. The simple yet sleek app provides access to more than 270 easy-to-use clinical decision tools including risk scores, algorithms, equations, formulas, classifications, dosing calculators, and more.

Unique features, ideal for the busy practicing clinician:

• Works offline and in limited connection settings.
• Fast and easy search and filter to discover new calculators.
• Customizable lists for quick access to: favorites, recently used, your specialty.
• Auto-syncing between the website and app.
• Quick toggle between US and SI units.
• Error warnings and normal values to help avoid mistakes and improper inputs.

Our exclusive “MDCalc Method” for selecting tools - including in-depth appraisal and validation of evidence AND clinical relevance - results in only the highest-quality tools to help you make better decisions and be more efficient in your workflow. And our network of academic and practicing physician experts create easy-to-digest content to reinforce decision making and support training:

• Insights and advice from the EBM creators (e.g. Dr. Phil Wells’ on the Wells’ Criteria).
• Expert content by specialists on use cases, pearls & pitfalls, results interpretation and more.
• Synopses of the evidence from the original and validation research.

From iMedicalApps in 2016: “The evidence based medicine (EBM) components of the medical app are what really set MDCalc apart from its peers... The MDCalc app gives brief summaries of the critical studies concerning the medical calculator, links to the studies on PubMed as well as “pearls/pitfalls”, “next steps” and expert commentary from the authors of the calculators.” - iMedicalApps “MDCalc app, the best online medical calculator is now an app”

MDCalc clinical decision tools support 35+ specialties including cardiology, critical care/ICU, emergency medicine, endocrinology, gastroenterology, hematology, hepatology, infectious disease, internal medicine, nephrology, neurology, obstetrics, oncology, orthopedics, pediatrics, primary care, psychiatry, pulmonology, surgery, urology, and more! Here are some examples of the tools:

» CHA2DS2-VASc Score for Atrial Fibrillation Stroke Risk
» Creatinine Clearance (Cockcroft-Gault Equation)
» Wells’ Criteria for Pulmonary Embolism
» MELD Score (Model For End-Stage Liver Disease) (12 and older)
» Calcium Correction for Hypoalbuminemia
» SIRS, Sepsis, and Septic Shock Criteria
» Fractional Excretion of Sodium (FENa)
» Maintenance Fluids Calculations
» Corrected QT Interval (QTc)
» HAS-BLED Score for Major Bleeding Risk
» CHADS2 Score for Atrial Fibrillation Stroke Risk
» Child-Pugh Score for Cirrhosis Mortality
» TIMI Risk Score for UA/NSTEMI
» PERC Rule for Pulmonary Embolism
» Wells’ Criteria for DVT
» Mean Arterial Pressure (MAP)
» Centor Score (Modified) for Strep Pharyngitis
» Absolute Neutrophil Count (ANC)
» Glasgow Coma Scale/Score (GCS)
» CURB-65 Severity Score
» ABCD2 Score for TIA
» Anion Gap
» NIH Stroke Scale/Score (NIHSS)
» HEART Score for Major Cardiac Events
» GRACE ACS Risk and Mortality Calculator
» ASCVD Risk Algorithm
» Ottawa Ankle and Knee Rules

Category : Medical

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Reviews (29)

Rom. K. May 16, 2022     

The app is great, but for a while now the upper part of the application is cut for some reason. Not sure if it's a phone model problem or smth else. Will change to 5 stars when it's fixed

Jam. D. Aug 6, 2020     

It's great, works really nicely, it has all the medical scoring algorithms you would need, perfect thing to have as an app. Beware the US units which are default - they can be changed to European units easily, but you need to remember to press the convert button.

Mr_. Apr 26, 2022     

Amazing app. I have a suggestion, add a way to group scores that i have favorited together into sections, for example when i need to lookup an oncological score (that i forgot the name of) i can find it quickly in the oncology tab/Folder that i created earlier. Thanks.

Rus. P. Apr 4, 2020     

Useful app, but does not have the same content as their website. Missing quite a few calculators/algorithms. Edit: the updated version has all the same content now. Very well done. Excellent development team. Keep up the great work.

Ber. D. Jul 3, 2019     

It'd be better if I didn't have to select a given specialty to see a specific calculator. You should give us the option to select "All" under the menu "Specialty", so that all calculators are shown regardless of any specialty. Thank you.

Lak. K. T. Sep 23, 2019     

Such a wonderful app. Had made it so much easier in revising scores. Has also been a great help in patient management. Keep up the good work and keep changing the scores as newer guidelines come

Pau. M. Oct 7, 2020     

Has pretty much everything I need. Only thing is sometimes there's more than one calculator for a score and it's not clear which one to use. Example is Well's criteria for DVT / PE.

jlj. Jul 29, 2021     

Great app! Super useful that I use all the time. Would be great if there is an option for the Favourite lists to be synced across devices when using the same account!

Nex. R. May 16, 2022     

Very useful as a med student!

Bra. P. Jan 22, 2019     

phenomenal app. reason its got 3 stars right now is the nagging and mandatory sign in after a week. for an app designed to be used point if care, having a nag screen/login wall is unacceptable when you may need it now. just let people use it wo account. i created one because i like saving calcs .etc.

Sea. J. Sep 13, 2019     

Great app! Easy to use, explains scores! Many good features, though I only use a few. Has a handy "save" list to make sure I can fast access my regular go-to's. My only request would be to see CTAS Triage scores added.

Dav. P. Apr 4, 2020     

Can't log in after update. Stuck on 'submitting' EDIT- Who knew that my favourite app was also the favourite of so many other clinicians! Developer got back within hours to say database overwhelmed with new release and extra capacity added. I use this app on ambulance everyday at the moment. It helps me make decisions with my patients. Vital. Thanks guys.

Chr. L. Apr 11, 2020     

Brilliant. Regularly updated. Accurate description of tools including their limitations. User friendly UI. Uses metrics and SI units. Highly recommended for trainees and practitioners of medicine. Includes updated resources for essential tools that relates to Covid-19 management. Thank you kind developer and company for this amazing and handy free app. Much appreciated.

sha. a. Jul 31, 2020     

Its great during rounds and case prepration but since the last update its not working i have uninstall and then install it again several times but it simply won't work it's frustrating kindly fix it whatever it is !

Sun. R. P. Jan 12, 2021     

Is this App meant only for Medical Practitioners of US of A? Because signing up requires details of your Medical education details which only people from US of A can fill it up. Either you have to give false details just to register or you can't sign up. Basically people from the rest of the world cannot access. Please do let me know when you have become inclusive. Felt bad missing out on a good app. Today: Thank you for your response. As you guided, I signed up and got going. 👍🏻

Div. M. May 9, 2020     

I find it very useful for guiding my investigation-based decisions as an Emergency Physician. The latest update has made the app navigation also very user-friendly. Keep it up, MdCalc!

Kru. P. Apr 20, 2020     

Easy to use. Covers most of the scores and criteria in details. Also explains further management steps. Very useful and time saving resource.

Dus. C. Jan 26, 2022     

Great layout. Easy to use. The favorites list makes it easy to access your most used tests. Great app!

Ham. S. Feb 23, 2022     

It'd be nice if you can see normal lab values in the app

Chr. B. Apr 27, 2021     

Very useful, comprehensive and easy to use app. Invaluable as an aide memoir for junior and senior clinicians alike.

PAR. A. Apr 6, 2020     

After the recent update, the app isn't opening and keeps crashing. I reinstalled the app and now it's working like the best it always was. Thanks

Dav. J. May 29, 2020     

Rating amended: Thanks for getting back to me... I couldn't reset password through the app (this prob needs looking into) but could through my laptop via the web.

Ros. F. Jun 15, 2020     

Simple to use. A slightly better summary of interpretation would be nice. However to its credit they do list the original literature should one wish to read it

Sco. N. Jul 7, 2021     

Currently an intern, this makes life so much easier when trying to determine next course of action and looking less stupid on rounds! Highly recommend!

Mar. W. Apr 4, 2020     

Recent updates don't work. Can't log in despite uninstalling reinstalling clearing cache and resetting password. Wish I hadn't downloaded new update as old app worked great.

Oag. N. Apr 7, 2020     

Have been using this excellent App for a year. The App now want me to sign up and it won't allow me to register unless I choose the state that I am in. I don't live in USA. Please help me sign up.

Pet. S. Jun 6, 2020     

Good source with great links to the reference research. But wish I could click the pics to enlarge them e.g. the Canadian c-spine flow diagram can't be enlarged (I appreciate it's there in the calculator part).

Gan. Y. Sep 26, 2021     

It's one of the most useful app for critical care specialists. All scores are under one roof and most important it's very user friendly. Thanks for creating such a wonderful app.

Jok. Jul 4, 2020     

Super grateful for the developers and the medical physicians, scientist, and researchers who have contributed so much to the field of medicine, for putting everything that one could hope to find in textbooks more readily accessible in a mobile setup.