Best 6 Medical Calculators in 2026: Feature Comparison

Introduction

MDCalc Medical Calculator is the best overall pick for a medical calculator, based on its listed coverage of more than 35 specialties. This list covers six apps across iOS and Android, from broad calculator libraries to pediatric and reference-style tools.

Quick comparison table

This comparison is based on app listings, not hands-on testing.

1. MDCalc Medical Calculator

Best for: clinicians who want bedside decision support across many specialties.

MDCalc Medical Calculator is a clinical decision-support app used by medical professionals. It has calculators for conditions across more than 35 specialties, on both iOS and Android. Breadth is the draw here. If you move between specialties, you're less likely to need a second app.

2. Calculate by QxMD

Best for: users who want a free app with a large calculator library.

Calculate by QxMD is a free medical calculator and decision-support app for iOS and Android. The big selling point is its library of more than 300 calculators. The catch is registration, so plan on signing up before you can use it.

3. MedCalX

Best for: medical students and healthcare professionals on iPhone or iPad.

MedCalX is a medical calculator app aimed at both students and working professionals. One source describes it as iOS-only, with no Android version, so Android users should check before hunting for it. That dual audience is what sets it apart, and it suits people who study and practice on the same device.

4. Medscape

Best for: people who want calculators plus a wider medical reference tool.

Medscape pairs clinical tools and calculators with news, articles and continuing medical education. It runs on iOS and Android. The reference and CME content is the main extra. Calculators are just one part of a broader app, which some users will like and others will find cluttered.

5. Ped(z) Pediatric Calculator

Best for: Android users who need pediatric-specific calculations.

Ped(z) Pediatric Calculator is a pediatric calculator app that showed up in a list of Android medical calculator apps. Its pediatric focus makes it a narrower tool than the general libraries above. It is listed for Android only. Details are thin, so check the store listing for specifics.

6. mCalx

Best for: Android users who want a general master calculator for patient-specific computations.

mCalx is described as a master medical calculator and also appeared in a list of Android medical calculator apps. It gathers patient-specific computations in one tool. It is listed for Android only. As with Ped(z), confirm which calculators are available in the store listing before relying on it.

Frequently asked questions

What is the best medical calculator app?

On listed breadth, MDCalc Medical Calculator is the strongest pick, with coverage across more than 35 specialties.

Are there free medical calculator apps?

Yes. Calculate by QxMD is listed as free with more than 300 calculators, but it requires registration.

Which apps work on Android and which on iOS?

MDCalc, Calculate by QxMD and Medscape are on both. MedCalX is reported as iOS-only, while Ped(z) and mCalx are listed for Android only.

Can I rely on these apps for clinical decisions?

Treat them as aids. Verify results and follow your local protocols.

The verdict

MDCalc Medical Calculator is the strongest overall pick, thanks to its 35+ specialty coverage and professional bedside use. Calculate by QxMD is the runner-up for its 300+ free calculators, though it requires registration. Medscape is a second runner-up if you also want news, articles and CME.

Android users with pediatric needs should check Ped(z). iOS-only users can consider MedCalX.