// Calculators

Clinical calculators

Dedicated pages for each score with formula derivation, guideline cutoffs, pitfalls, and source references.

Renal

1

eGFR (CKD-EPI 2021)

Race-free estimated glomerular filtration rate from serum creatinine.

Hepatology

1

MELD-Na

90-day mortality and liver-transplant priority in cirrhosis (UNOS, age ≥12).

Cardiology

3

CHA₂DS₂-VASc

Annual ischemic stroke risk in non-valvular atrial fibrillation.

HAS-BLED

1-year major-bleeding risk on oral anticoagulation in AF.

QTc

Heart-rate-corrected QT interval — torsades de pointes risk.

Pulmonary

1

Wells score for PE

Pretest probability of pulmonary embolism in suspected outpatients/ED.