Calcs
272 free, evidence-referenced clinical calculators and medical scores across 19 specialties. Transparent, referenced and open.
♥ Cardiovascular / Vascular
ACTION ICU Score for Intensive Care in NSTEMI
Predicts the risk of ICU-level complications in initially uncomplicated NSTEMI patients
♥ CardiovascularAUB-HAS2 Cardiovascular Risk Index
Predicts 30-day risk of death, MI, or stroke in patients undergoing non-cardiac surgery
♥ CardiovascularBova Score for Pulmonary Embolism Complications
Predicts risk of PE-related complications in hemodynamically stable patients
♥ CardiovascularCaprini Score for Venous Thromboembolism
Stratifies VTE risk in surgical patients to guide thromboprophylaxis
♥ CardiovascularCHA₂DS₂-VASc Score
Stroke risk stratification in atrial fibrillation
♥ CardiovascularCHADS₂ Score
Original stroke risk score for atrial fibrillation (predecessor to CHA₂DS₂-VASc)
♥ CardiovascularCorrected QT Interval (QTc)
Heart rate-corrected QT interval using Bazett, Fridericia, and Framingham formulas
♥ CardiovascularDAPT Score
Determines benefit of prolonged dual antiplatelet therapy (>12 months) after coronary stenting
♥ CardiovascularEUROMACS Right Heart Failure Risk Score
Predicts risk of right heart failure after left ventricular assist device (LVAD) implantation
♥ CardiovascularFick Cardiac Output Calculation
Calculates cardiac output and cardiac index using the Fick principle from oxygen consumption and arteriovenous oxygen content difference
♥ CardiovascularFramingham Risk Score (CHD)
Estimates 10-year risk of coronary heart disease events
♥ CardiovascularGRACE Score (ACS)
Global Registry of Acute Coronary Events — in-hospital and 6-month mortality
♥ CardiovascularGupta Perioperative Risk for MICA
Estimates 30-day risk of myocardial infarction or cardiac arrest after non-cardiac surgery
♥ CardiovascularH2FPEF Score for Heart Failure with Preserved EF
Estimates probability of HFpEF in patients with unexplained dyspnea using clinical and echocardiographic variables
♥ CardiovascularHAS-BLED Score
Major bleeding risk assessment for patients on anticoagulation
♥ CardiovascularHEART Pathway (Early Discharge)
Combines the HEART score with serial troponins to identify chest-pain patients safe for early discharge
♥ CardiovascularHEART Score
Risk stratification for acute coronary syndrome in chest pain patients
♥ CardiovascularKillip Classification
Bedside classification of heart failure severity after acute MI
♥ CardiovascularMean Arterial Pressure (MAP)
Estimates average arterial pressure during a cardiac cycle
♥ CardiovascularModified Sgarbossa Criteria
Diagnoses acute MI in patients with left bundle branch block or ventricular paced rhythm using ECG criteria
♥ CardiovascularNYHA Heart Failure Classification
Classifies functional capacity and symptom severity in heart failure
♥ CardiovascularOttawa Heart Failure Risk Scale (OHFRS)
Identifies emergency department patients with acute heart failure at high risk of serious adverse events within 30 days
♥ CardiovascularPERC Rule
Pulmonary Embolism Rule-out Criteria — excludes PE without testing
♥ CardiovascularPESI (Pulmonary Embolism Severity Index) Score
Predicts 30-day mortality in acute pulmonary embolism and stratifies patients for safe outpatient treatment
♥ CardiovascularRevised Cardiac Risk Index (RCRI)
Estimates risk of major cardiac complications in non-cardiac surgery
♥ CardiovascularSAMe-TT₂R₂ Score (DOAC vs. Warfarin)
Predicts quality of warfarin anticoagulation control in AF to guide DOAC vs. VKA selection
♥ CardiovascularsPESI (Simplified PESI)
Simplified Pulmonary Embolism Severity Index for 30-day mortality risk
♥ CardiovascularTIMI Score (NSTEMI/UA)
Risk stratification for unstable angina and NSTEMI
♥ CardiovascularUS (MEDPED) Criteria for Familial Hypercholesterolemia
Diagnoses familial hypercholesterolemia (FH) using age-specific total cholesterol thresholds based on family relationship to an affected individual
♥ CardiovascularVillalta Score for Post-Thrombotic Syndrome (PTS)
Diagnoses and grades the severity of post-thrombotic syndrome (PTS) after deep vein thrombosis using five patient-reported symptoms, six clinician-assessed signs, and presence or absence of venous ulceration
♥ CardiovascularWells Score for DVT
Clinical prediction rule for deep vein thrombosis probability
♥ CardiovascularWells' Criteria for PE
Clinical prediction rule for pulmonary embolism probability
⚕ Critical Care / ICU
APACHE II
Acute Physiology and Chronic Health Evaluation for ICU mortality prediction
⚕ Critical CareBehavioral Pain Scale (BPS)
Quantifies pain in intubated, mechanically ventilated patients who cannot self-report
⚕ Critical CareBraden Score for Pressure Ulcer Risk
Assesses risk of developing pressure ulcers/injuries in hospitalized patients
⚕ Critical CareClinical Pulmonary Infection Score (CPIS) for VAP
Diagnoses ventilator-associated pneumonia using clinical, radiographic, and microbiological criteria
⚕ Critical CareEdmonton Symptom Assessment System — Revised (ESAS-r)
Patient-rated 0–10 numeric scale assessing 9 common symptoms in palliative and cancer care
⚕ Critical CareGO-FAR Score for In-Hospital CPR Outcomes
Predicts survival with favorable neurological outcome after in-hospital cardiac arrest treated with CPR
⚕ Critical CareHACOR Score for NIV Failure
Predicts failure of noninvasive ventilation (NIV) in hypoxemic patients at 1–2 hours after initiation
⚕ Critical CareIntraoperative Fluid Dosing in Adult Patients
Estimates IV fluid requirements during surgery based on weight, fasting duration, surgery type, and blood loss
⚕ Critical CareNEWS (National Early Warning Score)
Detects clinical deterioration and predicts adverse outcomes in hospitalized patients
⚕ Critical CareNonverbal Pain Scale (NVPS)
Quantifies pain in non-communicative or intubated patients using behavioral and physiological indicators
⚕ Critical CareqSOFA (Quick SOFA)
Bedside sepsis screening tool — no lab tests required
⚕ Critical CareRASS
Richmond Agitation-Sedation Scale for ICU sedation assessment
⚕ Critical CareRESP (Respiratory ECMO Survival Prediction) Score
Predicts in-hospital survival for adult patients initiated on venovenous ECMO for acute respiratory failure
⚕ Critical CareRSBI (Rapid Shallow Breathing Index)
Predicts success of ventilator weaning — f/VT ratio
⚕ Critical CareSAPS II
Simplified Acute Physiology Score II — ICU mortality prediction.
⚕ Critical CareSimplified Acute Physiology Score (SAPS) 3
Predicts ICU hospital mortality using 20 variables collected at or within 1 hour of ICU admission in critically ill adults
⚕ Critical CareSIRS Criteria
Systemic Inflammatory Response Syndrome identification
⚕ Critical CareSOFA Score
Sequential Organ Failure Assessment for ICU mortality prediction
◎ Respiratory / Pulmonology
A-a Gradient
Alveolar-arterial oxygen gradient for hypoxemia evaluation
◎ RespiratoryARISCAT Score for Postoperative Pulmonary Complications
Predicts risk of postoperative pulmonary complications in non-cardiac surgery
◎ RespiratoryAsthma Impairment and Risk Questionnaire (AIRQ)
Measures impairment and risk associated with asthma over the past 4 weeks
◎ RespiratoryBAP-65 Score for Acute Exacerbation of COPD
Predicts in-hospital mortality in acute exacerbations of COPD
◎ RespiratoryCOPD Assessment Test (CAT)
Quantifies COPD symptom impact on health status and quality of life
◎ RespiratoryCURB-65
Community-acquired pneumonia severity score for disposition decisions
◎ Respiratorydu Bois Score for IPF Mortality
Predicts 1-year and 2-year mortality in idiopathic pulmonary fibrosis using clinical and spirometric variables
◎ RespiratoryGOLD Criteria for COPD
Classifies COPD airflow obstruction severity and assigns ABCD groups to guide pharmacological therapy
◎ RespiratoryHestia Criteria for Outpatient PE Treatment
Identifies patients with acute PE safe for outpatient anticoagulation treatment
◎ RespiratorymMRC Dyspnea Scale
Modified Medical Research Council scale for grading breathlessness severity
◎ RespiratoryModified Asthma Predictive Index (mAPI)
Predicts future asthma diagnosis in young children with recurrent wheezing using major and minor risk criteria
◎ RespiratoryMuLBSTA Score for Viral Pneumonia Mortality
Predicts 90-day mortality in adults hospitalized with viral pneumonia using six clinical and laboratory parameters
◎ RespiratoryPediatric Asthma Score (PAS)
Bedside score stratifying severity of asthma exacerbations in children to guide acute management
◎ RespiratoryPIRO Score for CAP
Predicts ICU mortality in community-acquired pneumonia using Predisposition, Insult, Response, and Organ dysfunction domains
◎ RespiratoryPSI / PORT Score
Pneumonia Severity Index for community-acquired pneumonia risk stratification.
◎ RespiratoryQuick COVID-19 Severity Index (qCSI)
Predicts risk of critical respiratory illness within 24 hours in emergency department patients with COVID-19 using three clinical variables
◎ RespiratoryRespiratory Distress Observation Scale (RDOS)
Quantifies respiratory distress severity in patients unable to self-report using eight observable behavioral and physiological indicators
◎ RespiratoryRoth Score for Hypoxia Screening
Screens for hypoxia by having the patient count aloud in a single breath — a count <10 or time >10 seconds suggests SpO₂ <95%
◎ RespiratoryROX Index
Predicts success/failure of high-flow nasal cannula to avoid intubation
◎ RespiratorySMART-COP
Predicts need for intensive respiratory or vasopressor support in community-acquired pneumonia.
◎ RespiratorySTOP-BANG Questionnaire
Screens for obstructive sleep apnea risk using eight validated clinical questions in adults, guiding pre-operative and clinical sleep evaluation
⟁ Neurology / Stroke
Abbreviated Mental Test 4 (AMT-4)
Rapid 4-item cognitive screening for delirium and dementia in elderly patients
⟁ NeurologyABC/2 Formula for ICH Volume
Estimates intracerebral hemorrhage volume from CT measurements
⟁ NeurologyABCD² Score
Stroke risk stratification after transient ischemic attack (TIA)
⟁ NeurologyASCOD Algorithm for Ischemic Stroke
Assigns a phenotype and probability of causality across five etiologic domains for ischemic stroke
⟁ NeurologyASPECTS
Alberta Stroke Program Early CT Score — ischemic stroke CT scoring.
⟁ NeurologyBerg Balance Scale (BBS)
Assesses static and dynamic balance and predicts fall risk in older adults
⟁ NeurologyGlasgow Coma Scale (GCS)
Standardized assessment of consciousness level after brain injury
⟁ NeurologyHunt and Hess Classification
Clinical grading scale for aneurysmal subarachnoid hemorrhage severity and surgical risk
⟁ NeurologyICH Score
30-day mortality prediction in spontaneous intracerebral hemorrhage.
⟁ NeurologyMigraine Treatment Optimization Questionnaire-4 (mTOQ-4)
Determines the effectiveness of current acute migraine treatment using 4 validated questions
⟁ NeurologyModified Fisher Grading Scale for SAH
Grades CT findings in subarachnoid hemorrhage to predict risk of cerebral vasospasm and delayed ischemic neurological deficit
⟁ NeurologyModified Rankin Scale for Neurologic Disability
Grades degree of disability or dependence in daily activities after stroke or other neurological conditions
⟁ NeurologyMyasthenia Gravis Activities of Daily Living (MG-ADL)
Patient-reported 8-item scale quantifying MG symptom severity across bulbar, respiratory, and limb function domains
⟁ NeurologyNIH Stroke Scale (NIHSS)
Quantifies stroke severity to guide acute treatment decisions
⟁ NeurologyPain Assessment in Advanced Dementia Scale (PAINAD)
Assesses pain intensity in patients with advanced dementia through behavioral observation across five domains
⟁ NeurologyPFO-Associated Stroke Causal Likelihood (PASCAL)
Classifies the likelihood that a patent foramen ovale (PFO) caused an ischemic stroke using anatomical and clinical features
⟁ NeurologyPittsburgh Response to Endovascular therapy (PRE) Score
Predicts 90-day functional independence after endovascular therapy for acute ischemic stroke using pre-treatment variables
⟁ NeurologyRCVS² Score
Distinguishes reversible cerebral vasoconstriction syndrome (RCVS) from other intracranial arteriopathies including primary angiitis of the CNS (PACNS)
⟁ NeurologySchwab and England Activities of Daily Living Scale
Grades functional independence in activities of daily living in Parkinson's disease patients on a 0–100% scale
⟁ NeurologytPA Dose for Ischemic Stroke Calculator
Calculates weight-based alteplase (tPA) total dose, IV bolus, and infusion for acute ischemic stroke per AHA/ASA guidelines
⟁ NeurologytPA Dose for Ischemic Stroke Calculator
Calculates alteplase (tPA) total dose, IV bolus, and infusion volumes for acute ischemic stroke thrombolysis based on patient weight
⟁ NeurologyWebster Rating Scale for Parkinson's Disease
Quantifies disability severity in Parkinson's disease across ten motor and functional domains, stratifying disease into mild, moderate, and severe stages
✚ Surgery / Trauma / Emergency
Alvarado Score (MANTRELS)
Clinical prediction rule for acute appendicitis
✚ SurgeryAppendicitis Inflammatory Response (AIR) Score
Diagnoses acute appendicitis using clinical and laboratory findings
✚ SurgeryBlast Lung Injury Severity Score
Stratifies primary blast lung injuries to guide ventilator management and predict ARDS risk
✚ SurgeryCanadian CT Head Rule
Identifies adults with minor head injury who need CT imaging
✚ SurgeryCholeS Score for Laparoscopic Cholecystectomy Duration
Predicts operative duration of elective laparoscopic cholecystectomy
✚ SurgeryCholeS Score for Laparoscopic Cholecystectomy Duration
Predicts operative time >90 minutes for elective or emergency laparoscopic cholecystectomy
✚ SurgeryISS — Injury Severity Score
Anatomical scoring system for trauma severity based on AIS regions.
✚ SurgeryLRINEC Score for Necrotizing Soft Tissue Infection
Laboratory-based score to differentiate necrotizing fasciitis from other severe soft tissue infections
✚ SurgeryNEXUS C-Spine Rule
Identifies trauma patients who do NOT need cervical spine imaging
✚ SurgeryParkland Formula (Burns)
Fluid resuscitation calculation for burn patients
✚ SurgeryPedSRC Rule for Blunt Abdominal Trauma
Identifies children at very low risk (<0.1%) of intra-abdominal injury after blunt abdominal trauma, potentially avoiding CT
✚ SurgeryPreoperative Mortality Predictor (PMP) Score
Estimates 30-day perioperative mortality risk in patients undergoing general surgery using five preoperative clinical variables
✚ SurgeryRevised Tokuhashi Scoring System
Predicts survival and guides surgical decision-making in patients with spinal metastases using six preoperative clinical variables
✚ SurgeryRule of Nines (Burns)
Rapid estimation of total body surface area (TBSA) burned
✚ SurgeryShock Index
Heart rate / systolic BP ratio for hemodynamic instability detection
✚ SurgerySubaxial Injury Classification (SLICS)
Classifies subaxial cervical spine (C3–C7) injuries and guides surgical vs. conservative management using morphology, DLC integrity, and neurological status
✚ SurgeryThoracolumbar Injury Classification (TLICS)
Classifies thoracolumbar spine injuries and guides surgical vs. conservative management using injury morphology, posterior ligamentous complex integrity, and neurological status
✚ SurgeryWisconsin Criteria for Maxillofacial CT
Clinical decision rule identifying patients who require computed tomography of the face after facial trauma, stratifying high-risk features to guide appropriate imaging
⬡ Gastroenterology / Hepatology
ABIC Score for Alcoholic Hepatitis
Predicts short-term survival in patients with alcoholic hepatitis
⬡ GastroenterologyAIMS65 Score
Predicts in-hospital mortality from acute upper GI bleeding before endoscopy
⬡ GastroenterologyBISAP Score
Early severity prediction in acute pancreatitis within 24 hours
⬡ GastroenterologyChild-Pugh Score
Classification of severity of cirrhosis and hepatic dysfunction
⬡ GastroenterologyCrohn's Disease Activity Index (CDAI)
Measures Crohn's disease activity over 7 days to classify remission, mild, moderate, or severe disease
⬡ GastroenterologyFIB-4 Index
Non-invasive liver fibrosis assessment using routine lab values
⬡ GastroenterologyForrest Classification of Upper GI Bleeding
Endoscopic classification of peptic ulcer bleeding stigmata to stratify rebleeding risk and guide endoscopic therapy
⬡ GastroenterologyGlasgow-Blatchford Bleeding Score (GBS)
Predicts need for intervention in acute upper GI bleeding before endoscopy
⬡ GastroenterologyMayo Score / Disease Activity Index (DAI) for Ulcerative Colitis
Quantifies disease activity in ulcerative colitis using clinical and endoscopic parameters to guide treatment decisions
⬡ GastroenterologyMELD Score for End-Stage Liver Disease Mortality (MELD 3.0)
Estimates 90-day mortality in end-stage liver disease using the updated MELD 3.0 formula incorporating sex and sodium
⬡ GastroenterologyMELD-Na Score
Model for End-Stage Liver Disease with sodium correction
⬡ GastroenterologyOakland Score for Safe Discharge After Lower GI Bleed
Identifies patients with acute lower GI bleeding who can be safely discharged without inpatient intervention
⬡ GastroenterologyPELD Creatinine (Pediatric End-Stage Liver Disease)
Updated PELD formula incorporating serum creatinine for pediatric liver transplant waitlist prioritization
⬡ GastroenterologyPELD Score (Younger Than 12)
Classic pediatric MELD equivalent for prioritizing liver transplant in children under 12 years with end-stage liver disease
⬡ GastroenterologyPrague C & M Classification for Barrett's Esophagus
Standardized endoscopic grading of Barrett's esophagus extent using circumferential (C) and maximal (M) measurements in cm from the gastroesophageal junction
⬡ GastroenterologyR-Factor (Hepatotoxicity Pattern)
Classifies drug-induced liver injury pattern as hepatocellular, cholestatic, or mixed
⬡ GastroenterologyRanson's Criteria (Pancreatitis)
Predicts severity and mortality in acute pancreatitis at admission and 48 hours
⬡ GastroenterologyRome IV - Child Functional Nausea and Vomiting
Applies Rome IV H2b criteria to diagnose Functional Nausea and Functional Vomiting in children and adolescents aged 4–18 years
⬡ GastroenterologyRome IV - Fecal Incontinence
Applies Rome IV C7 criteria to diagnose functional fecal incontinence in adults, with classification by mechanism and severity
⬡ GastroenterologyRome IV - Functional Chest Pain
Applies Rome IV B3 criteria to diagnose functional chest pain of presumed esophageal origin after cardiac and esophageal causes have been excluded
⬡ GastroenterologyRome IV - Functional Pancreatic Sphincter of Oddi Disorder
Applies Rome IV E2 criteria to diagnose Functional Pancreatic Sphincter of Oddi Disorder in adults with recurrent unexplained pancreatitis after exclusion of structural, metabolic, and toxic causes
⬡ GastroenterologyRome IV - Opioid-Induced Constipation (OIC)
Applies Rome IV criteria to diagnose opioid-induced constipation and guides evidence-based management with laxatives, PAMORAs, and dose optimisation
⬡ GastroenterologyRome IV - Reflux Hypersensitivity (B2)
Applies Rome IV B2 criteria to diagnose reflux hypersensitivity — heartburn or chest pain with symptom-reflux correlation on pH-impedance monitoring despite normal esophageal acid exposure
⬡ GastroenterologyWest Haven Criteria for Hepatic Encephalopathy
Grades severity of hepatic encephalopathy (HE) from covert to coma based on clinical neuropsychiatric findings
◈ Nephrology / Fluids / Acid-Base
Anion Gap
Serum anion gap calculation for metabolic acidosis differential
◈ NephrologyBicarbonate Replacement
Calculates NaHCO₃ deficit and replacement dose for metabolic acidosis.
◈ NephrologyBUN/Creatinine Ratio
Differentiates prerenal from intrinsic renal causes of azotemia
◈ NephrologyCKD-EPI (eGFR)
Estimated glomerular filtration rate using the 2021 CKD-EPI equation
◈ NephrologyCorrected Sodium (for Hyperglycemia)
Adjusts measured sodium for the dilutional effect of hyperglycemia
◈ NephrologyCreatinine Clearance (Cockcroft-Gault)
Estimates CrCl for drug dose adjustments
◈ NephrologyFENa
Fractional Excretion of Sodium — differentiates prerenal from intrinsic AKI
◈ NephrologyFEUrea
Fractional Excretion of Urea — AKI differential when on diuretics
◈ NephrologyFree Water Deficit
Estimates free water deficit for hypernatremia correction
◈ NephrologyMcMahon Score for Rhabdomyolysis
Predicts mortality or acute kidney injury requiring dialysis in patients with rhabdomyolysis
◈ NephrologyPotassium Replacement Calculator
Estimates KCl dose needed to correct hypokalemia
◈ NephrologyRevised Schwartz Equation for GFR (2009)
Estimates glomerular filtration rate in children and adolescents using height and serum creatinine (bedside 2009 CKiD equation)
◈ NephrologySerum Osmolality (Calculated) & Osmolar Gap
Calculated serum osmolality and osmolar gap for toxic alcohol evaluation
◈ NephrologySodium Correction Rate (Adrogué-Madias)
Estimates the effect of 1L of IV fluid on serum sodium for safe correction
◈ NephrologyUrine Output and Fluid Balance
Calculates urine output rate (mL/kg/hr) and net fluid balance from intake and output data, with AKI oliguria staging
◇ Endocrinology / Metabolic
ADA Type 2 Diabetes Risk Test
Identifies adults at risk for type 2 diabetes or prediabetes using a validated point-based questionnaire
◇ EndocrinologyBeAM Value
Calculates the difference between bedtime and morning fasting blood glucose to assess basal insulin effect
◇ EndocrinologyBurch-Wartofsky Point Scale (BWPS) for Thyrotoxicosis
Estimates the likelihood of thyroid storm in patients with thyrotoxicosis
◇ EndocrinologyCanadian Diabetes Risk Assessment Questionnaire (CANRISK)
Estimates 10-year risk of developing type 2 diabetes or prediabetes in Canadian adults
◇ EndocrinologyCorrected Calcium
Adjusts total calcium for hypoalbuminemia
◇ EndocrinologyDiabetes Distress Scale (DDS17)
Assesses emotional distress specific to living with diabetes across four subscales
◇ EndocrinologyDiabetic Ketoacidosis Mortality Prediction Model (DKA MPM) Score
Predicts in-hospital mortality and classifies severity of diabetic ketoacidosis at presentation
◇ EndocrinologyEdmonton Obesity Staging System (EOSS)
Stratifies obesity-related disease burden and functional limitations across five stages to guide treatment intensity
◇ EndocrinologyInsulin Correction & Sensitivity Calculator
Calculates insulin sensitivity factor, correction dose, and I:C ratio
◇ EndocrinologyInternational Diabetes Federation-Ramadan Alliance (IDF-DAR)
Stratifies risk of fasting during Ramadan in patients with diabetes to guide individualized management
◉ Hematology / Oncology
4Ts Score (HIT)
Pre-test probability of heparin-induced thrombocytopenia
◉ HematologyAbsolute Neutrophil Count (ANC)
Calculates absolute neutrophil count to assess neutropenia severity
◉ HematologyBALL Score for Relapsed/Refractory CLL
Prognostic score predicting survival in relapsed/refractory CLL patients receiving targeted therapy
◉ HematologyFollicular Lymphoma International Prognostic Index (FLIPI)
Five-factor prognostic scoring system for follicular lymphoma predicting overall survival
◉ HematologyGELF Criteria for Follicular Lymphoma
Identifies patients with high tumor burden follicular lymphoma requiring immediate systemic therapy
◉ HematologyGenetically Inspired Prognostic Scoring System (GIPSS) for PMF
Predicts overall survival in primary myelofibrosis using karyotype and somatic mutation data
◉ HematologyHScore for Reactive Hemophagocytic Syndrome
Estimates the probability of reactive hemophagocytic syndrome (HPS/HLH) from clinical and laboratory parameters
◉ HematologyIMDC Risk Model for Metastatic RCC
Stratifies prognosis in metastatic renal cell carcinoma (Heng/IMDC criteria)
◉ HematologyIMPROVE Risk Score for VTE
Predicts 3-month VTE risk in hospitalized medical patients to guide thromboprophylaxis decisions
◉ HematologyIMPROVE Risk Score for VTE
Predicts 3-month risk of venous thromboembolism in medically ill hospitalized patients
◉ HematologyInternational Prognostic Index for CLL (CLL-IPI)
Stratifies chronic lymphocytic leukemia into four risk groups using five weighted prognostic factors
◉ HematologyMASCC Risk Index for Febrile Neutropenia
Identifies low-risk cancer patients with febrile neutropenia who may safely receive outpatient oral antibiotic therapy
◉ HematologyMentzer Index
Differentiates beta-thalassemia trait from iron deficiency anemia using MCV and RBC count
◉ HematologyMutation-Adjusted Risk Score (MARS) for Advanced Systemic Mastocytosis
Stratifies prognosis in advanced systemic mastocytosis using S/A/R mutation status and clinical-laboratory parameters
◉ HematologyPadua Prediction Score for Risk of VTE
Stratifies VTE risk in hospitalized medical patients to guide thromboprophylaxis decisions
◉ HematologyPREVAIL Model for Prostate Cancer Survival
Predicts overall survival in chemotherapy-naive men with metastatic castration-resistant prostate cancer (mCRPC) receiving novel androgen receptor inhibitors
◉ HematologyRevised IPSS-R for Myelodysplastic Syndrome (MDS)
Stratifies MDS prognosis into 5 risk categories using cytogenetics, bone marrow blasts, hemoglobin, platelets, and ANC
◉ HematologySokal Index for CML
Calculates baseline prognostic risk in chronic myeloid leukemia (CML) using age, spleen size, platelet count, and peripheral blast percentage
◉ HematologyTherapeutic Plasmapheresis Calculator
Calculates plasma volume, exchange volume per session, and fraction of pathological substance remaining after therapeutic plasma exchange (TPE)
⬢ Infectious Disease
ATLAS Score for Clostridioides difficile Infection
Predicts treatment failure in Clostridioides difficile infection using five clinical and laboratory variables
⬢ Infectious DiseaseCentor Score (Modified/McIsaac)
Likelihood of streptococcal pharyngitis and need for testing/antibiotics
⬢ Infectious DiseaseDRIP Score
Predicts drug-resistant pathogen risk in community-onset pneumonia to guide antibiotic selection
⬢ Infectious DiseaseFeverPAIN Score for Strep Pharyngitis
Predicts likelihood of Group A Streptococcal pharyngitis to guide antibiotic prescribing
⬢ Infectious DiseaseRule of 7s for Lyme Meningitis
Distinguishes Lyme meningitis from aseptic meningitis in children with CSF pleocytosis using three clinical criteria based on the number 7
℞ Pharmacology / Medications
Atropine Dosing for Cholinesterase Inhibitor Toxicity
Calculates initial atropine dose and titration guidance for organophosphate, carbamate, or nerve agent poisoning
℞ PharmacologyCorticosteroid Equivalency Converter
Converts doses between systemic corticosteroids based on anti-inflammatory potency equivalence
℞ PharmacologyDose by BSA (mg/m²)
Converts BSA-based dosing (mg/m²) to actual dose using patient height and weight
℞ PharmacologyDrug Dose by Weight (mg/kg → mL)
Converts weight-based dosing to administered volume using drug concentration
℞ PharmacologyDrug Infusion Rate Calculator
Converts mcg/kg/min or mg/hr dose orders to pump rate (mL/hr)
℞ PharmacologyHeparin Infusion Calculator
Weight-based heparin bolus and drip rate calculator for VTE and ACS.
℞ PharmacologyIV Drip Rate Calculator
Calculates drops/min for gravity infusions and mL/hr for pump infusions
℞ PharmacologyPharmacogenomic Dosing Advisor (CPIC / DPWG / FDA / EMA)
Genotype-guided dose, avoidance and switch recommendations across 60 drug–gene pairs
℞ PharmacologyVancomycin AUC Dosing
AUC/MIC-guided vancomycin dosing and monitoring per ASHP/IDSA/SIDP 2020 guidelines.
℞ PharmacologyVasopressor Converter
Convert vasopressor doses between mcg/kg/min, mg/hr, and mL/hr.
℞ PharmacologyWarfarin Pharmacogenetic Dosing (Gage Algorithm)
Estimates therapeutic daily warfarin dose using genetics (CYP2C9/VKORC1) and clinical factors
◐ Pediatrics / Neonatology
NeuroDev Guidance
Growth charts and neurodevelopmental surveillance with a cited, level-based recommendation for specialist assessment
◐ PediatricsAPGAR Score
Rapid assessment of newborn clinical status at birth
◐ PediatricsCornell Assessment of Pediatric Delirium (CAPD)
Nurse-administered delirium screening tool for critically ill children across all developmental stages
◐ PediatricsCorrected Age for Preterm Infants
Corrected (adjusted) age from gestational age at birth and chronological age, with the period over which correction applies
◐ PediatricsEat, Sleep, Console (ESC) Assessment
Function-based neonatal opioid withdrawal tool to guide pharmacotherapy decisions
◐ PediatricsFLACC Pain Scale (Face, Legs, Activity, Cry, Consolability)
Behavioral pain assessment scale for non-verbal or pre-verbal children and adults unable to self-report pain
◐ PediatricsKawasaki Disease Diagnostic Criteria
Diagnoses Kawasaki Disease and incomplete Kawasaki Disease using classic AHA criteria and supplemental laboratory/echo findings
◐ PediatricsM-CHAT-R/F Score Interpretation
Applies the official M-CHAT-R/F scoring algorithm to the total and Follow-Up scores (items not reproduced)
◐ PediatricsMaintenance IV Fluids (4-2-1 Rule)
Holliday-Segar method for calculating maintenance fluid requirements
◐ PediatricsMid-Parental (Target) Height
Expected adult height range from the parents' heights (Tanner method, ±8.5 cm)
◐ PediatricsPECARN Pediatric Head Injury Rule
Identifies children at very low risk for clinically important traumatic brain injury
◐ PediatricsPediatric ETT Size
Endotracheal tube size estimation by age for pediatric intubation
◐ PediatricsPediatric SIRS, Sepsis, and Septic Shock
Applies age-specific IPSCC 2005 criteria to diagnose SIRS, sepsis, severe sepsis, and septic shock in children
◐ PediatricsStandard Score Converter (Composite, T, Scaled, z)
Converts norm-referenced test scores to z-score and percentile, with publisher-cited labels only
◐ PediatricsStep-by-Step Approach to Febrile Infants
Sequential algorithm to identify low-risk febrile infants 22–90 days old for serious bacterial infection, guiding safe outpatient management
◑ Obstetrics / Maternal
Prenatal Guidance
Gestational age and due date by LMP, IVF/IUI dates or ultrasound (Robinson–BMUS, INTERGROWTH-21st), with the antenatal recommendations for that week compiled from WHO, national authorities and US societies — every body side by side, every statement cited
◑ ObstetricsBishop Score
Cervical readiness assessment for labor induction success prediction
◑ ObstetricsFetal Biophysical Profile (BPP) Score
Assesses fetal wellbeing and risk of fetal distress using five ultrasound and NST parameters
◑ ObstetricsFirst Trimester Twin MoM Adjustment
Corrects PAPP-A and free beta-hCG MoM values for twin pregnancies by chorionicity
◑ ObstetricsIntrauterine RBC Transfusion Dosage
Estimates the volume of packed red blood cells for intrauterine transfusion based on fetal weight and hematocrit values
◑ ObstetricsRisk of Malignancy Index (RMI) for Ovarian Cancer
Combines ultrasound features, menopausal status, and CA-125 to estimate the risk of malignancy in an adnexal mass before surgery
◑ ObstetricsVBAC Risk Score (Flamm Model)
Predicts the likelihood of successful vaginal birth after cesarean (VBAC) using six antepartum and intrapartum variables from the Flamm 1997 admission scoring system
▣ Nutrition / Enteral / TPN
GIR (Glucose Infusion Rate)
Glucose/dextrose infusion rate in mg/kg/min for TPN and IV dextrose management
▣ NutritionHarris-Benedict (BMR/TEE)
Basal metabolic rate and total energy expenditure estimation
▣ NutritionNUTRIC Score
Nutritional Risk in the Critically Ill — identifies ICU patients who benefit from aggressive nutrition.
▣ NutritionNutritional Risk Index (NRI)
Quantifies malnutrition risk using serum albumin and weight change from usual body weight
◎ Psychiatry / Mental Health
Behavioral Activity Rating Scale (BARS)
Seven-point observational scale for rapid bedside assessment of agitation severity and treatment response
◎ PsychiatryBrief Alcohol Withdrawal Scale (BAWS)
Monitors severity of alcohol withdrawal symptoms to guide pharmacological treatment
◎ PsychiatryCAGE Questionnaire
Brief 4-item screening tool for alcohol use disorder
◎ PsychiatryCIWA-Ar
Clinical Institute Withdrawal Assessment for Alcohol — revised
◎ PsychiatryClinical Opiate Withdrawal Scale (COWS)
Rates the severity of opioid withdrawal symptoms to guide clinical management
◎ PsychiatryColumbia Suicide Severity Rating Scale (C-SSRS)
Standardized assessment of suicidal ideation and behavior severity
◎ PsychiatryCurrent Opioid Misuse Measure (COMM)
Identifies aberrant medication-related behaviors in patients on long-term opioid therapy for chronic non-cancer pain
◎ PsychiatryDanger Assessment Tool for Domestic Abuse
Predicts risk of being killed or nearly killed by an intimate partner in a violent relationship
◎ PsychiatryDIRE Score for Opioid Treatment
Predicts patient suitability and compliance for long-term opioid therapy in chronic non-cancer pain
◎ PsychiatryEdinburgh Postnatal Depression Scale (EPDS)
10-item self-report screening tool for postpartum depression in mothers and fathers
◎ PsychiatryGAD-7
Screening and severity measure for generalized anxiety disorder
◎ PsychiatryGlasgow Modified Alcohol Withdrawal Scale (GMAWS)
Monitors alcohol withdrawal severity to guide benzodiazepine dosing in clinical settings
◎ PsychiatryHEADS-ED
Pediatric emergency department mental health screening tool — identifies youth requiring urgent psychiatric consultation
◎ PsychiatryMajor Depression Index (MDI)
Screens for and measures severity of major depressive disorder using ICD-10 and DSM-IV diagnostic criteria
◎ PsychiatryMontgomery-Åsberg Depression Rating Scale (MADRS)
Clinician-rated 10-item scale measuring severity of depressive episodes in adults across key symptom domains
◎ PsychiatryPHQ-9 (Patient Health Questionnaire)
Depression severity screening and monitoring tool
◎ PsychiatryPrimary Care PTSD Screen for DSM-5 (PC-PTSD-5)
5-item self-report screen for PTSD in primary care settings, aligned with DSM-5 symptom clusters
◎ PsychiatryShort Michigan Alcoholism Screening Test (SMAST)
Screens for alcohol use disorder with 13 yes/no questions; score ≥3 indicates probable alcohol problem
◎ PsychiatryStanford Sleepiness Scale
Rates current subjective sleepiness on a 7-point scale to assess momentary alertness and guide safe activity decisions
◻ Dermatology
EASI Score (Eczema Area and Severity Index)
Quantifies atopic dermatitis severity across four body regions for clinical and research use
◻ DermatologyPsoriasis Area and Severity Index (PASI)
Quantifies psoriasis severity and body surface area involvement across four anatomical regions to generate a composite score from 0 to 72
◻ DermatologyScoring Mastocytosis (SCORMA) Index
Quantifies severity of cutaneous mastocytosis by combining skin lesion morphology and area with systemic symptom burden
◻ DermatologySCORTEN
Severity-of-illness score for toxic epidermal necrolysis (TEN/SJS)
⧖ Clinical Genetics
GenePedigree
Pedigree editor with standardized NSGC nomenclature, 2D editing, 3D view and multi-format import and export
⧖ Clinical Genetics · AppPrenatal Guidance
Gestational age and due date by LMP, IVF/IUI dates or ultrasound (Robinson–BMUS, INTERGROWTH-21st), with the antenatal recommendations for that week compiled from WHO, national authorities and US societies — every body side by side, every statement cited
⧖ Clinical Genetics17q21.31 Microdeletion Risk (Koolen-de Vries)
Estimates KdVS risk based on parental H1/H2 inversion genotypes using Koolen et al. Bayesian model
⧖ Clinical GeneticsABC System for Genetic Variant Classification
Stepwise functional (A) → clinical (B) → comment (C) classification for any type of genetic variant (Houge et al. 2021/2024)
⧖ Clinical GeneticsACMG-AMP 2015 Variant Pathogenicity Classifier
Standardized 5-tier classification of sequence variants per ACMG/AMP 2015 guidelines with VUS sub-classification
⧖ Clinical GeneticsAMP/ASCO/CAP Somatic Variant Tier Classification
Four-tier clinical-actionability classification of somatic variants in cancer (Li et al. 2017)
⧖ Clinical GeneticsBayesian Conditional Risk (Age-Adjusted Penetrance)
Adjusts prior genetic risk downward based on age-specific penetrance in asymptomatic individuals
⧖ Clinical GeneticsClinGen CNV Classification — Copy-Number GAIN
Official ACMG/ClinGen point-based scoring for a constitutional copy-number gain, with assignable points per criterion
⧖ Clinical GeneticsClinGen CNV Classification — Copy-Number LOSS
Official ACMG/ClinGen point-based scoring for a constitutional copy-number loss, with assignable points per criterion
⧖ Clinical GeneticsClinGen SVI / VCEP Points — Bayesian Variant Classifier
Point-based ACMG/AMP classification with criterion strength modulation, as used by ClinGen VCEPs
⧖ Clinical GeneticsCNV Analytical Classification System
ACMG/ClinGen-inspired scoring for constitutional Copy Number Variants
⧖ Clinical GeneticsCoefficient of Consanguinity & Inbreeding (F)
Calculates the inbreeding coefficient F and reproductive risk for consanguineous unions
⧖ Clinical GeneticsCohen & Daniel Viability Thresholds
Evaluates fetal survival potential of chromosome imbalances in reciprocal translocations
⧖ Clinical GeneticsEmpirical Risk in Chromosome Inversions
Estimates the risk of viable unbalanced offspring for inversion carriers
⧖ Clinical GeneticsGail Model — Breast Cancer Risk (BCRAT)
Estimates 5-year and lifetime risk of invasive breast cancer using validated clinical factors
⧖ Clinical GeneticsHaploid Autosomal Length (HAL) Calculator
Converts the physical portion of a chromosome arm into a percentage of the total autosomal genome
⧖ Clinical GeneticsHardy-Weinberg Carrier Risk
Calculates carrier frequency and reproductive risk for autosomal recessive diseases
⧖ Clinical GeneticsISCN Cytogenetic Nomenclature Parser
Decodes ISCN karyotype strings into plain-language clinical descriptions
⧖ Clinical GeneticsNIPT Positive Predictive Value (PPV/NPV)
Calculates PPV and NPV of a cfDNA prenatal screening result using Bayes theorem
⧖ Clinical GeneticsPENN II — BRCA1/2 Mutation Probability Score
Point-based score estimating prior probability of identifying a BRCA1 or BRCA2 pathogenic variant
⧖ Clinical GeneticsPharmacogenomic Dosing Advisor (CPIC / DPWG / FDA / EMA)
Genotype-guided dose, avoidance and switch recommendations across 60 drug–gene pairs
⧖ Clinical GeneticsPost-Trisomy Recurrence Risk (Morris / Grande)
Estimates aneuploidy recurrence risk using complete age-specific lookup tables
⧖ Clinical GeneticsResidual Carrier Risk (Negative Screen)
Post-test carrier probability after a negative screening result using Bayes theorem
⧖ Clinical GeneticsWarfarin Pharmacogenetic Dosing (Gage Algorithm)
Estimates therapeutic daily warfarin dose using genetics (CYP2C9/VKORC1) and clinical factors
☢ Radiology / Radiation Oncology
⚙ Clinical Utilities
Body Mass Index (BMI)
Classifies weight status based on height and weight
⚙ Clinical UtilitiesBSA — Du Bois Formula
Body Surface Area estimation for drug dosing
⚙ Clinical UtilitiesCharlson Comorbidity Index (CCI)
Predicts 10-year mortality based on weighted comorbidity burden
⚙ Clinical UtilitiesHOSPITAL Score for Readmissions
Predicts potentially avoidable 30-day hospital readmissions at discharge
⚙ Clinical UtilitiesIdeal Body Weight (IBW) & Adjusted BW
Devine formula for IBW, plus adjusted body weight for obese patients
⚙ Clinical UtilitiesMedical Unit Converter
Common medical unit conversions: mg↔µg, mmol↔mg/dL, kg↔lb, °C↔°F, etc.
⚙ Clinical UtilitiesOsteoporosis Risk Assessment Instrument (ORAI)
Identifies women at risk for low bone mineral density who should undergo DEXA scanning
⚙ Clinical UtilitiesPatient Activity Scale (PAS) for Rheumatoid Arthritis
Original composite patient-reported RA disease activity scale using HAQ disability index, pain, and global assessment
⚙ Clinical UtilitiesPatient Activity Scale II (PAS II) for Rheumatoid Arthritis
Composite patient-reported outcome measure quantifying rheumatoid arthritis disease activity using pain, HAQ-II, and global assessment