CHA₂DS₂-VASc Score
Estimate thromboembolic risk in patients with atrial fibrillation.
Cardiovascular
Clinical tools
Clinical Calculators
Evidence-based medical calculators, risk scores, and clinical decision tools for healthcare professionals.
Creatinine Clearance
Estimate creatinine clearance using the Cockcroft-Gault equation.
Renal
Estimated Due Date
Estimate the expected date of delivery from the first day of the last menstrual period.
Obstetrics
Estimated Gestational Age
Estimate gestational age from the first day of the last menstrual period.
Obstetrics
HAS-BLED Score
Estimate bleeding risk in patients receiving or being considered for anticoagulation.
Cardiovascular
eGFR
Estimate glomerular filtration rate using the 2021 CKD-EPI creatinine equation.
Renal
Anion Gap
Calculate the serum anion gap from sodium, chloride, and bicarbonate.
Laboratory
Body Mass Index
Calculate body mass index from weight and height.
Clinical Utilities
Body Surface Area
Estimate body surface area from weight and height.
Clinical Utilities
CURB-65
Estimate severity and mortality risk in adults with community-acquired pneumonia.
Respiratory
Corrected Calcium
Estimate corrected total serum calcium from measured calcium and albumin.
Laboratory
Corrected QT Interval
Estimate the corrected QT interval from QT interval and heart rate.
Cardiovascular
MELD-Na
Calculate the Model for End-Stage Liver Disease incorporating serum sodium.
Hepatology
Mean Arterial Pressure
Estimate mean arterial pressure from systolic and diastolic blood pressure.
Clinical Utilities
Wells Score for DVT
Estimate the pretest probability of lower-extremity deep vein thrombosis.
Risk Scores
Wells Score for Pulmonary Embolism
Estimate the pretest probability of pulmonary embolism using the Wells clinical prediction rule.
Risk Scores
qSOFA
Calculate the quick Sequential Organ Failure Assessment score.
Critical Care