Clinical calculators
Gastroenterology and hepatology. Links open MDCalc in a new tab unless otherwise stated.
Inflammatory bowel disease (IBD)
Clinical / laboratory activity
- Crohn’s Disease Activity IndexCDAICalculator →
- Harvey–Bradshaw IndexHBICalculator →
- Mayo Disease Activity Index (full)Mayo DAICalculator →MDCalc does not have a separate calculator for the Partial Mayo Score (pMayo) — use this one (the endoscopic subscore can be omitted).
- Truelove–Witts Severity IndexTWCalculator →
- Travis Criteria—Calculator →
- Montreal ClassificationMontrealCalculator →
Endoscopic indices (not available on MDCalc — IG-IBD)
- SES-CD · CDEIS · Rutgeerts · Endoscopic Mayo ScoreendoIG-IBD ↗No separate public UCEIS calculator is available; it is calculated manually (3–8 points).
Liver disease — cirrhosis and ascites
- Child–Pugh ClassificationChild–PughCalculator →
- MELD / MELD-Na / MELD 3.0 (combined)MELDCalculator →MDCalc combines all three versions on a single page with a selector.
- Serum–ascites albumin gradientSAAGCalculator →
Fibrosis and MASLD (NAFLD)
- FIB-4 IndexFIB-4Calculator →
- AST to Platelet Ratio IndexAPRICalculator →
- MASLD (NAFLD) Fibrosis ScoreNFSCalculator →
Autoimmune hepatitis
- Simplified AIH ScoreAIHCalculator →
- Revised Original AIH ScoreAIH rev.Calculator →
Alcohol-related liver disease
- Maddrey’s Discriminant FunctionMDFCalculator →
- Lille ModelLilleCalculator →
- Glasgow Alcoholic Hepatitis ScoreGAHSCalculator →
- ABIC ScoreABICCalculator →
Acute liver failure
- King’s College Criteria (paracetamol)KCCCalculator →
Hepatocellular carcinoma
- Barcelona Clinic Liver Cancer stagingBCLCCalculator →
- Metroticket (survival / transplantation)MetroticketCalculator →
- Modified RECIST (treatment response)mRECISTCalculator →
Upper GI bleeding
- Glasgow–Blatchford ScoreGBSCalculator →
- Rockall Score (complete, post-endoscopy)RockallCalculator →
- Rockall Score (pre-endoscopy)Rockall preCalculator →
- AIMS65 ScoreAIMS65Calculator →
- Forrest Classification (endoscopic)ForrestCalculator →
Lower GI bleeding
- Oakland ScoreOaklandCalculator →
Acute pancreatitis
- BISAP ScoreBISAPCalculator →
- Ranson’s CriteriaRansonCalculator →
- Glasgow–Imrie CriteriaGlasgow-ImrieCalculator →
- APACHE IIAPACHE IICalculator →
- Harmless Acute Pancreatitis ScoreHAPSCalculator →
- SIRS CriteriaSIRSCalculator →
- Modified Marshall organ dysfunction scoreMarshallQxMD ↗MDCalc does not provide this calculator — link to QxMD.
Nutritional risk
- Nutrition Risk Screening 2002NRS-2002Calculator →
- Malnutrition Universal Screening ToolMUSTCalculator →
General clinical calculators
- Body mass index + body surface areaBMI · BSACalculator →MDCalc combines BMI and BSA (Mosteller) on a single page.
- Ideal body weight (and adjusted body weight)IBWCalculator →
- Creatinine clearance (Cockcroft–Gault)CrClCalculator →
- Estimated GFR (CKD-EPI 2021)eGFRCalculator →
Endoscopic classifications (descriptive)
- Los Angeles (A–D) — reflux oesophagitisLAEndoscopy-Campus ↗
- Prague C&M — Barrett’s oesophagusPragueEndoscopy-Campus ↗
- IBUS-SAS / Limberg — bowel ultrasoundIUSNo public calculator is available; assessed manually (bowel wall thickness, Doppler signal, wall stratification, i-fat).
Not available on MDCalc — we do not include MDCalc links for the following (no dedicated tool is available):
- CLIF-C AD and CLIF-C ACLF — decompensated cirrhosis / ACLF (calculated using EASL-CLIF formulas).
- ALBI classification — HCC (the albumin–bilirubin score is calculated using a formula).
- King’s College Criteria (non-paracetamol) — MDCalc only provides the paracetamol version.
- West Haven Classification — hepatic encephalopathy (descriptive scale).
Links checked 2026‑07. Calculators do not replace clinical judgement. Sources: MDCalc, IG-IBD, Endoscopy-Campus, QxMD.