Clinical calculators

Gastroenterology & Hepatology Calculators

Gastroenterology and hepatology calculators include acute upper GI bleeding pre- and post-endoscopy risk stratification, alcohol-associated-hepatitis severity context, version-specific liver scores, a cirrhosis classification, laboratory and fibrosis-related indices, and paired serum–ascites albumin arithmetic.

Preserve the selected model version, laboratory method, specimen pairing, and population boundary; similar liver-related outputs are not interchangeable.

Tools by task

Upper GI bleeding

Pre-endoscopy GBS or AIMS65 and staged historical or full post-endoscopy Rockall scoring.

Glasgow-Blatchford ScoreGlasgow-Blatchford Bleeding Score (GBS) CalculatorCalculate the original pre-endoscopy Glasgow-Blatchford Score for acute upper GI bleeding from measured urea/BUN, hemoglobin, blood pressure, pulse, and explicit clinical findings.AIMS65 Score Calculator for Upper GI BleedingCalculate the original Saltzman 2011 AIMS65 score from albumin, INR, altered mental status, systolic blood pressure, and age, with exact thresholds and historical mortality context.Rockall Score Calculator for Upper GI BleedingCalculate the original 1996 Rockall Score with direct age, pulse, systolic pressure, comorbidity, and optional post-endoscopy diagnosis/stigmata inputs.

Alcohol-associated hepatitis

Historical baseline Maddrey DF and on-treatment Day-4 or Day-7 Lille response assessment.

Maddrey mDFMaddrey Discriminant Function Calculator for Alcohol-Associated HepatitisCalculate the modified Maddrey Discriminant Function from patient PT, the corresponding laboratory control PT, and total bilirubin, with exact threshold and current MELD/Lille context.Lille Score Calculator for Alcohol-Associated HepatitisCalculate the adult Day-4 or Day-7 Lille score after corticosteroid therapy from baseline variables and bilirubin evolution, with exact formula provenance and a threshold-safe 0.45 audit.

Cirrhosis & liver severity

Specified current or historical MELD models and Child-Pugh in established cirrhosis.

MELD Score Calculator – MELD 3.0, MELD-Na & Classic MELDCalculate current OPTN MELD 3.0 for age 12+ or reproduce historical MELD-Na and classic MELD with version-specific inputs and limits.Child-Pugh Score Calculator (Child-Turcotte-Pugh / CTP)Calculate the standard five-domain Child-Turcotte-Pugh score and class for established cirrhosis using bilirubin, albumin, INR or PT prolongation, ascites, and encephalopathy.

Fibrosis & laboratory indices

Source-limited APRI and De Ritis laboratory indices, not standalone diagnoses.

AST-to-Platelet Ratio Index (APRI) CalculatorCalculate APRI from same-assessment AST, the reporting laboratory’s AST upper limit, and platelet count, with current HCV/HBV context and non-diagnostic limits.AST/ALT Ratio Calculator (De Ritis Ratio)Calculate the unitless AST/ALT ratio from a same-panel pair reported in U/L, with absolute-enzyme, laboratory, and non-diagnostic context.

Ascites

SAAG from corresponding serum and ascitic-fluid albumin measurements.

Serum-Ascites Albumin Gradient (SAAG) CalculatorCalculate the signed SAAG from same-day serum and ascitic-fluid albumin, with independent units and non-diagnostic interpretation limits.

Important limits

A score or gradient does not replace clinical assessment, laboratory trends, imaging, pathology, or applicable program rules.
These pages do not determine transplant allocation or eligibility, medication, surveillance, referral, or treatment.

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