5 Gastroenterology & Hepatology Calculators – MELD, Child-Pugh, APRI & SAAG
Gastroenterology and hepatology calculators include version-specific liver severity scores, a cirrhosis classification, laboratory and fibrosis-related indices, and paired serum–ascites albumin arithmetic.
Choose the exact MELD version or other model required by the task. Similar liver-related outputs have different populations, inputs, and purposes and should not be treated as substitutes.
All medical calculatorsSources and review processMedical disclaimer
Choose a calculator by task
Use the task groups below to find the calculator whose formula, intended population, required measurements, and purpose match the task.
Liver severity and allocation-related scores
Use the specified current or historical MELD model, or Child-Pugh in its established-cirrhosis assessment context.
Fibrosis and laboratory indices
Calculate APRI or the De Ritis AST/ALT ratio as source-limited laboratory indices without assigning a diagnosis.
Ascites-fluid arithmetic
Calculate SAAG only from serum and ascitic-fluid albumin values collected at the required corresponding time point.
How to choose a calculator in this category
- Distinguish current OPTN MELD 3.0 from historical MELD-Na and classic MELD before entering version-specific inputs.
- Use Child-Pugh only in its stated established-cirrhosis context and preserve the selected coagulation measure.
- For SAAG, pair serum and ascitic-fluid albumin measurements from the corresponding assessment and use compatible units.
Important limits
- APRI and the De Ritis ratio cannot establish liver disease, fibrosis stage, etiology, or prognosis on their own.
- 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.