Clinical Scales & Calculators

Free online clinical scale calculators and dosage calculators for physicians and medical students. Total: 86 tools (79 scales and 7 dosage calculators).

Pulmonology

• CURB-65 — Community-Acquired Pneumonia Severity Assessment
• PESI (Pulmonary Embolism Severity Index) — Risk Stratification in Confirmed PE (30-Day Mortality)
• sPESI (Simplified PESI) — Simplified PE Risk Stratification Without Laboratory Tests (Except Saturation)
• mMRC Dyspnea Scale — Assessment of Breathlessness Severity per the Modified Medical Research Council Scale

Emergency Medicine

• qSOFA — Quick Bedside Sepsis Risk Assessment
• Wells Score (PE) — Clinical Probability Assessment for Pulmonary Embolism
• Geneva Score (PE) — Clinical Probability of PE (Revised Geneva Score)
• SOFA — Sequential Organ Failure Assessment (Sepsis, ICU)
• HEART Score — Risk Stratification for Chest Pain
• Shock Index — HR / SBP — Rapid Hemodynamic Assessment
• RASS Scale (Agitation — Sedation) — Richmond Agitation-Sedation Scale
• PSS — Poisoning Severity Score — Severity of Acute Poisoning by Most Affected Body System
• Infusion Rate Calculator · calculator — Calculation of infusion rate in ml/h, drops/min, and interval between drops (sec) with a visual metronome.
• Dopamine Calculator · calculator — Dopamine infusion rate calculation (mcg/kg/min → ml/h) with automatic dose interpretation and threshold badges.
• Dobutamine Calculator · calculator — Dobutamine infusion rate calculation (mcg/kg/min → ml/h) with automatic dose interpretation for inotropic support
• Adrenaline Calculator (Infusion) · calculator — Continuous adrenaline infusion rate calculation (mcg/kg/min → ml/h) with an automatic dose badge. Not for bolus doses
• Phenylephrine (Mesaton) Calculator · calculator — Phenylephrine infusion rate calculation (mcg/kg/min → ml/h). Used for hypotension in anesthesiology and vasoplegic states
• Propofol Calculator (Sedation) · calculator — Propofol infusion rate calculation in ml/h based on dose (mg/kg/h) and emulsion concentration (1% or 2%).
• Noradrenaline Calculator · calculator — Noradrenaline infusion rate calculation in ml/h based on dose in mcg/kg/min, patient weight, and drug dilution.

Cardiology

• CHA₂DS₂-VASc — Stroke Risk Assessment in Atrial Fibrillation
• HAS-BLED — Bleeding Risk Assessment in Anticoagulant Therapy
• ARC-HBR — High Bleeding Risk (HBR) in PCI / Antithrombotic Therapy
• ORAKUL — National Bleeding Risk Score in Acute Coronary Syndrome
• PRECISE-DAPT — Bleeding Risk and Dual Antiplatelet Therapy Duration Selection After PCI
• NYHA Functional Class — Classification of Chronic Heart Failure Severity
• Killip Classification — Heart Failure Assessment in Acute Myocardial Infarction
• PREVENT — 10-Year ASCVD Risk — Calculation of 10-Year Atherosclerotic Cardiovascular Disease Risk (AHA PREVENT 2024)
• QTc — Corrected QT — Corrected QT via 4 Formulas: Bazett, Fridericia, Framingham, Hodges
• Heart Rate from R-R Interval — Heart Rate Calculation Based on R-R Duration
• Electrical Axis of the Heart — QRS Axis Determination Using Amplitudes in I and aVF
• Sgarbossa Criteria — Diagnosis of AMI in Left Bundle Branch Block (LBBB)
• Tisdale Score (QT Prolongation Risk) — Prediction of QT Prolongation in Hospitalized Patients
• EuroSCORE II — Predicted In-Hospital Mortality for Cardiac Surgery

Neurology

• Glasgow Coma Scale (GCS) — Assessment of Level of Consciousness
• Modified Rankin Scale (mRS) — Assessment of Disability Post-Stroke
• 4AT — Rapid Bedside Delirium Screening
• ABCD² — Stroke Risk Assessment in the First 2–7 Days After TIA
• Oswestry Disability Index (ODI) — Disability Index for Low Back Pain
• Roland — Morris Disability Questionnaire (RDQ) — Impact of Low Back Pain on Function: 24 Statements
• MoCA — Score Calculation — Montreal Cognitive Assessment: Section Scores Sum Adjusted for Education

Gastroenterology

• Child-Pugh — Assessment of Liver Cirrhosis Severity and Prognosis
• Rockall Score (Pre-Endoscopy) — Risk Assessment in Upper Gastrointestinal Bleeding Prior to Endoscopy
• MELD — Model for End-Stage Liver Disease — Severity Assessment in Cirrhosis and Transplant Waitlist
• Maddrey's Discriminant Function — Alcoholic Hepatitis Severity; Threshold ≥ 32 — Typical Indication for GCS
• GAHS (Glasgow Alcoholic Hepatitis Score) — Prognosis of Alcoholic Hepatitis and Steroid Therapy Selection
• Lille Model for Alcoholic Hepatitis — Response to Steroid Therapy at Day 7; Threshold 0.45
• APRI (AST to Platelet Ratio Index) — Non-Invasive Assessment of Liver Fibrosis
• FIB-4 — Fibrosis Index Based on Age, AST, ALT, and Platelets
• METAVIR Fibrosis Stage — Histological Liver Fibrosis Stage (Biopsy)
• Knodell Fibrosis Score (Ishak Simplified: 0–4) — Fibrosis Score in Knodell Index / Ishak Stage

Obstetrics / Neonatology

• Apgar score — Newborn condition assessment at 1 and 5 minutes of life
• Bishop score — Assessment of cervical readiness for labor induction
• EFI — Endometriosis Fertility Index (simplified) — Prognosis of spontaneous pregnancy after surgery (Adamson–Pasta, simplified)

Internal Medicine

• Centor / McIsaac score — Assessment of GABHS pharyngitis probability and indications for antibiotics
• Padua prediction score — Assessment of venous thromboembolism risk in non-surgical patients
• Charlson Comorbidity Index (CCI) — Cumulative severity of comorbid conditions and prognosis
• Borg scale (RPE 6–20) — Subjective rating of perceived exertion
• VAS pain scale (Visual Analog Scale) — Pain intensity assessment on a 10-point visual analog scale
• Timed Up and Go test (TUG) — Assessment of gait, balance, and fall risk in the elderly: test execution time

Surgery

• Alvarado score — Assessment of acute appendicitis probability
• ASA physical status classification — ASA classification of anesthetic risk
• Caprini score — Individual risk assessment for venous thromboembolic events
• rRCRI (revised Cardiac Risk Index) — Risk of cardiac complications in non-cardiac surgery (reconstructed Lee index)
• QuickDASH — Brief questionnaire for disabilities of the arm, shoulder, and hand

Screening

• AUDIT-C — Screening for risky alcohol consumption
• Body Mass Index (BMI) — BMI calculation from height and weight with WHO classification
• AUDIT (full WHO questionnaire, 10 items) — Identification of hazardous and harmful alcohol use
• CAGE (alcohol dependence screening) — Four questions, "yes" answer = 1 point
• MUST — Malnutrition Universal Screening Tool — Malnutrition risk in adults
• HADS — Hospital Anxiety and Depression Scale — Screening for anxiety and depression in somatic patients: two 7-item subscales
• Hamilton Anxiety Rating Scale (HARS, HAM-A) — Clinical assessment of anxiety severity: 14 items, clinician-rated
• NRS-2002 — nutritional risk — Nutritional risk screening in hospitalized patients (ESPEN)

Nephrology

• GFR (CKD-EPI 2021) and CKD stage — Calculation of glomerular filtration rate and chronic kidney disease stage
• GFR by CKD-EPI (cystatin C, 2012) — eGFR calculation using cystatin C only (adults)
• KDIGO risk matrix (GFR and albuminuria) — CKD progression risk category (G + A)

Oncology

• ECOG / WHO (performance status) — Scale for assessing the general condition of a cancer patient
• Karnofsky Performance Scale (KPS) — Percentage assessment of self-care and work capacity
• CLL-IPI (Chronic Lymphocytic Leukemia International Prognostic Index) — Risk stratification in chronic lymphocytic leukemia
• CIRS-G (Cumulative Illness Rating Scale-Geriatric) — Cumulative severity across 14 organ systems (0–4 each)
• FIGO / WHO 2000 — GTN prognostic score — Low vs high risk of gestational trophoblastic neoplasia
• Khorana score — VTE risk in ambulatory cancer patients receiving chemotherapy
• HCT-CI — Hematopoietic Cell Transplantation Comorbidity Index — Transplantation risk in candidates for allogeneic hematopoietic stem cell transplantation
• EBMT risk score — Transplantation risk before allogeneic HSCT based on five factors
• RECIST 1.1 — tumor response to treatment — Calculation of solid tumor response category: CR, PR, SD, or PD based on the sum of diameters of target lesions

Infectious Diseases

• Bristol Stool Form Scale — Classification of stool consistency (types 1–7)

Pediatrics

• CDS (Clinical Dehydration Scale) — Assessment of dehydration in children with gastroenteritis

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