Calculate by QxMD

Clinical calculator & decision support tool

  • Converts recent research publications into practical handheld tools
  • Comprehensive and insightful results
  • Available for iPhone, iPad, Android tablets & smartphone and web
  • More than 400 unique calculators and decision support tools

Intuitive Design

Automatically adapts to your clinical practice

Unique ‘Question Flow’ technology gets you answers, fast

SI and Imperial units

Expert Tools

Developed by a collaboration of clinician experts & researchers

Converts recent research publications into practical handheld tools: knowledge translation at its best


Referenced Content

Detailed references with PubMed links

‘Read by QxMD’ integration provides direct access to original research for a given tool

>400 Clinical Calculators & Decision Support Tools

Point-of-care tools in the areas of cardiology, internal medicine, nephrology, general practice, hematology, gastroenterology, emergency medicine, oncology, orthopedics, respirology, neurology, neurosurgery, general surgery, obstetrics and more

A-a Gradient
ABCD² Score
Dialysis Access Recirculation
Estimate Infarct Size – Anterior
Estimate Infarct Size – Inferior
Anion Gap
AR: Quantification (Volumetric)
AR: Regurgitant Orifice (PISA)
AS: Aortic Valve Area (Cont)
AS: Aortic Valve Area (DVI)
AS: Aortic Valve Area (Gorlin)
AS: Aortic Valve Area (Hakki)
Autoimmune Hepatitis Diagnosis
AVM Rupture Risk
Surgery in Asymptomatic Aortic Stenosis
PCI mortality – Canada Score
Bishop Score
Blatchford Score
Bleeding Risk in Atrial Fibrillation: OBRI
BMI and BSA (Mosteller)
BODE Index for COPD
BMI and BSA (Du Bois)
Pretest Probablity of CAD
Canadian CT Head Rule
Canadian C-Spine Rule
HEART Score for chest pain in the ER
BC Cardiac Surgical Intensive Care Score
ACC/AHA CV Risk Calculator (2013)
CHADS2 Score for AF
CHA2DS2-VASc Score for AF
Framingham CHF Criteria
Child Pugh Score
eGFR using CKD-EPI
CMML Prognostic Scoring Systems (from Spain and Dusseldorf)
Risk of Contrast Nephropathy Post-PCI
Corrected QT
Corticosteroid Equivalence
Cerebral Perfusion Pressure
CrCl Cockroft-Gault
CrCl from 24h Urine
CRUSADE Score for Post-MI Bleeding Risk
CT Severity Index in Pancreatitis
Dialysis Risk After Cardiac Surgery (Cleveland Clinic Score by Thakar)
ECG: Cycle Length
Dialysis Risk After Cardiac Surgery (Mehta)
Discriminant Function in Alcoholic Hepatitis
Diffuse Large B-Cell Lymphoma Prognosis (R-IPI)
DLBCL Prognosis – IPI24
Dubbo Osteoporotic Fracture Risk
Duke Criteria for Endocarditis
Duke Treadmill Score
DVT Clinical Probability (Well’s)
Syncope – EGSYS Score
ECG: Heart Rate
Ejection Fraction (Simplified)
Emory Model (TIPSS)
Glomerulosclerosis on Biopsy (2015)
ROKS – Recurrence Of Kidney Stone (2014)
Solitary Pulmonary Nodule Malignancy Risk
Stage Hypopharyngeal Carcinoma
Lund-Mackay Sinusitis Stage
Stage Ethmoid Sinus Carcinoma
Stage Maxillary Sinus Carcinoma
Stage Mucosal Melanoma
Stage Nasopharyngeal Carcinoma
Stage Oral Cavity Carcinoma
Stage Oropharyngeal Carcinoma
Stage Salivary Gland Carcinoma
Stage Thyroid Carcinoma: Anaplastic
Stage Thyroid Carcinoma: Medullary
Stage Thyroid Carcinoma: Well-Differentiated
Epworth Sleepiness Scale
Pulmonary Embolism Severity Index (PESI)
EuroSCORE – CV Surgery Risk
Exercise Capacity (METs)
SAH Fisher Grade
Follicular Lymphoma prognosis
Forrester HF Class
Forrest Classification
FOUR Score
Fractional Shortening
Fractional Excretion of Sodium
Fractional Excretion of Urea
Lipid Lowering Guidelines using Framingham (2008)
Lipid Lowering Guidelines using Framingham (ATP-III)
Mortality in IPF (GAP Index)
Glasgow Coma Scale (GCS)
Risk of Renal Graft Failure at 5-Years
Acute GVHD Grading
Bleeding Risk in Atrial Fibrillation: HAS-BLED Score
Prognosis in Hodgkin’s Disease
Hematopoietic cell transplantation – specific comorbidity index (HCT-CI)
MDS Revised – International Prognostic Scoring System (IPSS-R)
Hemodynamics (Echo)

Cardiac Output – Fick
HIT 4T’s score
Hodgkin’s Marrow Involvement
SAH Hunt & Hess Scale
ICH Score
ICH Volume
Metabolic Syndrome (IDF)
In-flight PaO₂ (based on ABG)
In-flight PaO₂ (ABG & PFT)
MDS International Prognostic Scoring System (IPSS)
Multiple Myeloma Prognosis (ISS)
Kidney Failure Risk Equation
Killip Class
Kt/V from PRU
Kt/V Daugirdas
Stage Laryngeal Carcinoma: Glottic
Stage Laryngeal Carcinoma: Subglottic
Stage Laryngeal Carcinoma: Supraglottic
Left Atrial Systolic Pressure
LV/RV Contractility (dp/dt)
MASCC Febrile Neutropenia Risk
Predict 6-Month Mortality on HD
Home HD Candidacy (MATCH-D)
PD Candidacy (MATCH-D)
Mayo Quadratic eGFR
PCI complication – Mayo
MDRD eGFR (6 Variable)
MDS Anemia – EPO/GCSF Response
MDS WHO Classification-based Prognostic Scoring System (WPSS)
Prognosis after TIPSS using MELD Score
Prognosis in Alcoholic Hepatitis
Hamilton Depression Rating Scale (HAM-D or HDRS)
SNAP-IV 26 – Teacher & Parent Rating Scale
MGUS Prognosis
MIPI – Mantle Cell Lymphoma Prognosis
Modified Bernoulli Equation
Modified Fisher Scale
Modified Rankin Scale (mRS)
Modified Strep Score
MR: Quantification (PISA)
MR: Quantification (Volumetric)
MS: Wilkins’ Echo Score
MS: Mitral Valve Area (Cont)
MS: Mitral Valve Area (Gorlin)
MS: Mitral Valve Area (PHT)
MS: Mitral Valve Area (PISA)
MS: Mitral Valve Area (Hakki)
Myocardial Performance Index (CO and ET)
Myocardial Performance Index (IVRT and IVCT)
Nasal Cannula FiO₂ Estimation
NEXUS C-Spine Criteria
TIMI Risk Score (NSTEMI)
Prognosis in Renal Cell Carcinoma (UISS)
Osmolal Gap
Ottawa Ankle Rules
Ottawa Knee Rules
PaO₂:FiO₂ Ratio
Parkland Formula
PCI mortality – Michigan
PCWP (Echo)
PE Clinical Probability
Peak Expiratory Flow Prediction
Pediatric Endotracheal Tube Size
Pediatric Glasgow Coma Scale
Pediatric Strep Score
PELD Score – Age Younger Than 12 years
Disability Rating Scale (DRS)
Modified Ashworth Scale (MAS)
National Pressure Ulcer Advisory Panel Staging System (NPUAP)
DIPSS Prognosis in Myelofibrosis
Pneumonia risk (CURB-65)
Pulmonary Resistance
Ranson’s Criteria
Rate Pressure Product
Reynolds CAD Risk
Alcoholism – Risk of Relapse
Alcohol Relapse Risk after Liver Transplant
Revised Cardiac Risk Index (Lee Criteria)
Adult Onset Still’s Disease, Diagnostic Criteria
Simplified Disease Activity Index for RA (SDAI)
Membranous Prognosis
Rockall Score
RV Systolic Pressure (TR Jet)
Modified SAD PERSONS Scale
Schwartz Pediatric eGFR
Seattle Heart Failure Model
Shunt Fraction (Echo)
Shunt Fraction (Invasive)
Smoldering Multiple Myeloma Prognosis
Spetzler-Martin Score
TIMI Risk Score (STEMI)
Stevenson HF Class
Systemic Vascular Resistance
t-PA Dosing in Acute Stroke
TICI Score

Transtubular Potassium Gradient
Percent Reduction of Urea (PRU) in Dialysis
VALIANT Heart Failure Risk Score
Asymptomatic ICA (Internal Carotid Artery) Stenosis Surgical Risk Stratification
VSG – CRI: Carotid Endarterectomy
VSG – CRI: Endovascular Infrarenal AAA Repair
VSG – CRI: Lower Extremity Bypass
VSG – CRI: Open Infrarenal AAA Repair
Warfarin Bleeding Risk – Elderly
Water Deficit in Hypernatremia
Westley Croup Score
Surgical Safety Checklist
Membrane Transport Type in PD
Residual Kidney Function in PD
Residual Urea Clearance in PD
Volume of Distribution of Urea in PD
PD Prescription
FINDRISC Diabetes Risk Calculator
Familial Hypercholesterolemia
Due Date by LMP
Due Date by Ultrasound
Gestational Age
Gupta Perioperative Cardiac Risk
Ideal Body Weight
Pneumonia Severity Index (PORT Score)
Serum Ascites to Albumin Gradient (SAAG)
Mangled Extremity Severity Score (MESS)
Framingham Risk Score (2008)
Framingham Risk Score (ATP-III)
Recognize Thrombotic Microangiopathy
Identify Type of Thrombotic Microangiopathy
Postoperative Respiratory Failure Risk Calculator
Rodwell Hematologic Scoring System for Neonatal Sepsis
Calcium Correction for Hypoalbuminemia
Sequential Organ Failure Assessment (SOFA)
Alvarado Score for Acute Appendicitis
Patient Health Questionnaire-9 (PHQ-9)
DRAGON Score for Post-TPA Stroke Outcome
NIH Stroke Scale/Score (NIHSS)
SLICC SLE Criteria
DAS28-CRP for Rheumatoid Arthritis
DAS28-ESR for Rheumatoid Arthritis
Geriatric Depression Scale
Jones Criteria for Diagnosis of Rheumatic Fever
Clinical Disease Activity Index for RA (CDAI)
Surgical Apgar Score
Schwartz Pediatric Bedside eGFR (2009)
Schwartz Pediatric eGFR, Full Model (2009)
VSGNE Ruptured Abdominal Aortic Aneurysm (RAAA) Risk Score
Euroscore II
3-Month Mortality in Incident Elderly ESRD Patients
Pre-test probability of CAD (CAD consortium)
Survival after Resection for Adenocarcinoma of the Pancreas
ASDAS-CRP (Ankylosing Spondylitis Disease Activity Score)
ASDAS-ESR (Ankylosing Spondylitis Disease Activity Score)
Predicting 3 Year Survival for Incident Elderly ESRD Patients
Diffuse Large B-cell Lymphoma Prognosis (IPI24)
Aortic Stenosis Risk Score
Ottawa SAH Inclusion & Exclusion
Ottawa SAH Rule
The Braden Scale for Predicting Pressure Sore Risk
Pneumonia Risk after CABG
Vasculitis Damage Index (VDI)
Diffuse Large B-cell Lymphoma Prognosis (NCCN-IPI)
The Richmond Agitation Sedation Score (RASS)
Bleeding Risk in Atrial Fibrillation: ATRIA
DIPSS Plus Score for Prognosis in Myelofibrosis
Vascular Quality Initiative (VQI) Cardiac Risk Index (CRI) | Carotid Endarterectomy

Revised Venous Clinical Severity Score
SLICC/ACR Damage Index
Crohn’s Disease Activity Index (CDAI)
International Prostate Symptom Score (IPSS)
Mayo Early Screen for Discharge Planning
Mayo Score for Ulcerative Colitis Activity
NAFLD Fibrosis Score
Dialysis Duration Needed for Methanol Ingestion
Dialysis Duration Needed for Ethylene Glycol Ingestion
Total Body Water (Watson Formula)
NEXUS Chest Decision Instrument for Blunt Chest Trauma
5-Year Survival in Older CKD Patients
Chronic Kidney Disease Management: BC Guidelines
Mobilization of Hospitalized Patients with COPD Exacerbation (AECOPD-MOB)
Multiple Myeloma Prognosis (R-ISS)
Middle Ear Risk Index (MERI)
Injury Severity Score
Brain Metastases Prognostic Index
MELD Score – Age above 12 years
Corrected Sodium in Hyperglycemia
Pediatric Renal Angina Index
STARRT-AKI Enrollment Criteria
ATRIA Stroke Risk Score
Serious Illness Conversation Guide
qSOFA (quick Sepsis Related Organ Failure Assessment)
Kinetic eGFR (KeGFR)
Base Excess
Serious Renal Dysfunction Post-PCI
INTERHEART Modifiable Risk Score (IMHRS)
DAPT Score
Modified Marshall Score
International Index of Erectile Function (IIEF-5)
CRRT Dosing Calculator
Modified Glasgow Imrie Severity Criteria for Acute Pancreatitis
Long QT Syndrome Diagnostic Criteria
Canadian Syncope Risk Score (CSRS)
Expected spleen size
GAD-7 Anxiety Scale
Polymyalgia Rheumatica (2012 EULAR/ACR Provisional Criteria)
Scleroderma/Systemic Sclerosis (2013 EULAR/ACR Criteria)
San Francisco Syncope Rule
Vascular Quality Initiative (VQI) Cardiac Risk Index (CRI) | EVAR
Vascular Quality Initiative (VQI) Cardiac Risk Index (CRI) | Infra-inguinal Bypass
Vascular Quality Initiative (VQI) Cardiac Risk Index (CRI) | Open AAA Repair
VQI: Respiratory Adverse Event Risk Post Vascular Surgery
FIB-4 for Noninvasive Diagnosis of Hepatic Fibrosis
APRI (AST to Platelet Ratio Index)
MoCA (Montreal Cognitive Assessment)
PERC Rule for Pulmonary Embolism
PECARN Head Trauma Algorithm for Children <2 years
RPDAI (Relapsing Polychondritis Disease Activity Index)

Developed in Collaboration with Researchers from:

Want to see your research or guidelines adapted into Calculate?

12 + 11 =