Free Medical Calculators for Physicians
83 validated clinical calculators across 22 specialties. Each implements the published formula from its original reference paper. Free to use, no signup required.
Get AI-Powered Clinical InsightsCardiovascular(12)
CHA₂DS₂-VASc Score
Stroke risk stratification in atrial fibrillation
HAS-BLED Score
Major bleeding risk for patients on anticoagulation
HEART Score
Risk stratification for chest pain patients in the ED
TIMI Score (UA/NSTEMI)
Risk stratification for unstable angina/NSTEMI
TIMI Score (STEMI)
30-day mortality risk for STEMI
GRACE Score
ACS mortality prediction
ASCVD 10-Year Risk
Pooled Cohort Equations for CV risk
QTc Correction
Heart rate-corrected QT interval
Framingham Risk Score
10-year coronary heart disease risk
Sgarbossa Criteria
MI diagnosis in LBBB/paced rhythm
Mean Arterial Pressure (MAP)
Mean arterial pressure from systolic and diastolic blood pressure
Revised Cardiac Risk Index (RCRI/Lee)
Preoperative cardiac risk for non-cardiac surgery
Pulmonary(8)
Wells Criteria for PE
Pre-test probability of pulmonary embolism
Pulmonary Embolism Severity Index (PESI)
30-day mortality risk stratification for acute pulmonary embolism
Simplified PESI (sPESI)
Simplified 6-point PE severity index for identifying low-risk patients
CURB-65 Score
Pneumonia severity and disposition
PERC Rule
PE rule-out criteria for low-risk patients
A-a Gradient
Alveolar-arterial oxygen gradient
Light's Criteria
Pleural effusion classification — transudative vs exudative
PSI/PORT Score (Pneumonia Severity Index)
Pneumonia severity and admission decision
Emergency Medicine(7)
Ottawa Ankle Rule
Ankle/foot X-ray decision rule
Ottawa Knee Rule
Knee X-ray decision rule
Canadian C-Spine Rule
Cervical spine imaging decision rule
NEXUS Criteria
Cervical spine clearance criteria
SIRS Criteria
Systemic inflammatory response syndrome
Canadian Syncope Risk Score
Syncope 30-day serious adverse event risk and disposition
Injury Severity Score (ISS)
Trauma severity scoring using Abbreviated Injury Scale
General(6)
Body Mass Index
Weight classification based on height and weight
Body Surface Area
Body surface area calculation (Mosteller)
Ideal Body Weight
Ideal body weight (Devine formula)
LDL Cholesterol (Friedewald)
Calculated LDL when TG < 400
Estimated Average Glucose
Convert HbA1c to average glucose
ASA Physical Status Classification
Preoperative physical status assessment
Critical Care(6)
qSOFA Score
Quick sepsis screening outside ICU
Glasgow Coma Scale
Level of consciousness assessment
SOFA Score
Sequential Organ Failure Assessment
NEWS2 Score
National Early Warning Score for deterioration
APACHE II Score
ICU mortality prediction using acute physiology and chronic health evaluation
Predicted Body Weight (ARDSNet)
Predicted body weight for lung-protective ventilation tidal volume
Psychiatry(6)
PHQ-9 (Patient Health Questionnaire-9)
Depression screening and severity assessment
GAD-7 (Generalized Anxiety Disorder-7)
Anxiety screening and severity assessment
AUDIT-C
Alcohol use disorder screening
MDQ (Mood Disorder Questionnaire)
Bipolar disorder screening
C-SSRS (Columbia Suicide Severity Rating Scale)
Suicide risk assessment
MMSE (Mini-Mental State Examination)
Cognitive impairment screening
Renal(4)
eGFR (CKD-EPI 2021)
Estimated glomerular filtration rate using CKD-EPI 2021 equation (race-free)
Creatinine Clearance (Cockcroft-Gault)
Estimated creatinine clearance for drug dosing
Fractional Excretion of Sodium
Differentiates prerenal vs intrinsic renal AKI
Free Water Deficit
Free water deficit in hypernatremia
Electrolytes(4)
Neurology(4)
Hematology(3)
Hepatology(3)
Pediatrics(3)
Obstetrics(3)
Drug Dosing(3)
Gastroenterology(2)
Oncology(2)
Anesthesiology(2)
Infectious Disease(1)
Endocrinology(1)
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