Medical calculators
Clinical scores and lab estimates you can run in the browser: risk scores like CHA₂DS₂-VASc, HAS-BLED, Wells and CURB-65, liver scores like MELD and Child-Pugh, and lab values like the anion gap, corrected calcium, QTc and eGFR. Each calculator shows how the score is built, what each result band means, its limits, and links the original paper or guideline. They give scores only, never drug doses.
Centor score calculator
Score sore throat with the McIsaac age points and see the chance of group A strep and the testing step.
MELD calculator
MELD and MELD-Na with OPTN rules, plus MELD 3.0, from creatinine, bilirubin, INR and sodium.
CURB-65 calculator
Score pneumonia severity and see 30-day mortality and risk group from the original study.
HAS-BLED calculator
Score 1-year major bleeding risk in atrial fibrillation from 9 criteria, with the high-risk cut-off of 3.
Wells score for PE calculator
Score the 7 Wells criteria for suspected pulmonary embolism, with three-level and PE likely or unlikely results.
Anion gap calculator
Serum anion gap from sodium, chloride and bicarbonate, with optional potassium and the albumin correction.
Child-Pugh calculator
Grade cirrhosis severity from five items and see the Child-Pugh class A, B or C.
CHA₂DS₂-VASc calculator
Stroke risk score in atrial fibrillation, with the 2023 ACC/AHA annual risk band and the ESC CHA₂DS₂-VA score.
QTc calculator
Corrected QT interval by Bazett, Fridericia, Framingham and Hodges at once, graded by sex.
Corrected calcium calculator
Adjust total calcium for serum albumin in mg/dL or mmol/L, with the limits against ionized calcium.
Wells score for DVT calculator
Pretest probability of a leg DVT with the 2003 likely/unlikely model or the 1997 three-level model.
eGFR calculator
Estimated GFR from creatinine, age and sex with the CKD-EPI 2021 equation, plus the KDIGO GFR category.
