MDCalc Medical Calculator

MDCalc Medical Calculator: Your Evidence-Based Clinical Decision Support System

Stop guessing. Start calculating. MDCalc Medical Calculator puts over 550 clinical scoring tools, dosing calculators, and diagnostic algorithms directly into your hands—completely free. Built by MD Aware, LLC for practicing physicians, nurses, physician assistants, and medical students, this app transforms your smartphone into a precision clinical decision engine. No more memorizing complex formulas. No more flipping through reference books. Just instant, evidence-based calculations at the point of care.

Core Clinical Functionality

Unlimited Access to 550+ Clinical Tools
Every tool is curated through a rigorous selection process that filters out unreliable or outdated instruments. You get only the most validated scoring systems, risk stratifiers, and dosing calculators across every major specialty. From cardiology (CHA2DS2-VASc, HAS-BLED) to emergency medicine (Wells Criteria for PE, PERC Rule) to hepatology (MELD Score, Child-Pugh), the app covers the full spectrum of clinical decision needs. Each tool includes normal value ranges, flags potential input errors, and automatically converts units for international use.

Earn AMA PRA Category 1 CME Credits
More than 150 calculators are linked to CME-eligible clinical content. Study the evidence summaries, review the clinical context, and earn credits directly through the app. Your personal dashboard tracks all accumulated credits and provides real-time progress monitoring. A paid CME plan is required for credit redemption, but the educational content itself remains free to explore.

Offline Mode with Intelligent Sync
Access all 550+ calculators without an internet connection. The app caches your most-used tools and specialty-specific lists for instant retrieval in basements, rural clinics, or airplane cabins. When you reconnect, the app automatically syncs your CME progress and personalized favorites across mobile and web platforms. Note: CME credit tracking requires an active internet connection.

Advanced Workflow Features

• Smart Specialty Lists: Create custom collections of your 15 most-used calculators by specialty—cardiology, nephrology, pulmonology, or any combination. One tap access to your daily clinical arsenal.
• Unit Conversion Engine: Automatically converts between metric and imperial units, including weight (kg/lbs), lab values (mg/dL vs mmol/L), and creatinine clearance adjustments. No manual math required.
• Error Detection & Validation: The app alerts you to improbable input values, flags extreme outliers, and displays normal reference ranges for every parameter. Prevents calculation errors before they affect patient care.

Specialty Coverage & Featured Tools

The app spans 30+ medical specialties, with particular depth in:
- Cardiology: CHA2DS2-VASc, HAS-BLED, TIMI Risk Score, HEART Score
- Emergency Medicine: Wells Criteria, PERC Rule, Glasgow Coma Scale, NIH Stroke Scale
- Nephrology: Creatinine Clearance (Cockcroft-Gault), MDRD, CKD-EPI, MELD Score
- Infectious Disease: CURB-65, qSOFA, Pneumonia Severity Index
- Hematology: DVT Risk Assessment, Caprini Score, Padua Prediction Score
- Oncology: ECOG Performance Status, MASCC Risk Index, QTc Calculation

Each tool includes a one-tap evidence summary button that pulls up the original validation studies, statistical performance data, and clinical practice guidelines supporting the tool's use. No more wondering if a calculator is outdated—every instrument shows its last update date and citation.

Download MDCalc Medical Calculator Now

Stop wasting time with manual calculations and unreliable references. Get the most comprehensive clinical calculator suite trusted by over 2 million healthcare professionals worldwide. Download now and start making faster, more accurate clinical decisions immediately.

Technical Notice: This app requires an internet connection for CME credit tracking and initial download of new calculator updates. All 550+ calculators function fully offline once cached. In-app purchases available for the CME credit redemption plan. No advertising in the premium Turbo tier.