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Calculate by QxMD vs MDCalc Medical Calculator Usage & Stats
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.
- Apple App Store
- Free
- Medical
Store Rank
- -
MDCalc is the leading clinical decision support app providing 900+ evidence-based calculators, risk scores, and clinical tools to support patient care at the bedside. MDCalc has been trusted by millions of clinicians since 2005.
Why Clinicians Choose MDCalc:
• Created by Physicians, for Physicians - All tools developed and validated by board-certified physicians
• 900+ Clinical Tools - Risk scores, algorithms, dosing calculators, and more with consistent updates and new tools added regularly
• Works Offline - Full functionality without internet connection
• Evidence-Based - Every tool includes research validation and expert commentary
• CME Tracking - Earn CME just by reading through the clinical content surrounding many of our tools
• Free Registration - Complete access in under 30 seconds
Key Features:
Smart Search & Organization
• Quick search across all tools
• Customizable favorites and specialty lists
• Recently used tools for quick access
• Auto-sync between web and mobile
• Explore page for personalized suggestions
Clinical Expertise
• Expert insights from creators
• Pearls & pitfalls from specialists
• Evidence summaries with PubMed links
• Error warnings and normal value ranges
Workflow Support
• Toggle between US and SI units instantly
• Works in limited connectivity settings
• Easy to use at the point-of-care
Popular Tools Include:
• Creatinine Clearance - Cockcroft-Gault Equation
• HA2DS2-VASc Score - Atrial Fibrillation Stroke Risk
• HEART Score- Major Cardiac Events
• Wells' Criteria - Pulmonary Embolism & DVT
• MELD Score - End-Stage Liver Disease
• HAS-BLED Score - Major Bleeding Risk
• SIRS/Sepsis Criteria - Septic Shock Assessment
• Mean Arterial Pressure - Hemodynamic Monitoring
MDCalc ensures only the highest-quality, clinically relevant tools make it into the app. Each calculator undergoes rigorous evidence appraisal and validation by our network of academic and practicing physician experts.
- Apple App Store
- Free
- Medical
Store Rank
- -
Calculate by QxMD vs. MDCalc Medical Calculator ranking comparison
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January 14, 2026