Gastroenterology calculators

Explore validated-style scores and utilities commonly used in Gastroenterology. Follow links for full references, limitations, and the interactive calculator.

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Acute Pancreatitis Prediction Model
Early severity prediction model for acute pancreatitis.
Risk Scores · Updated 4/13/2026
AIMS65 Score for Upper GI Bleeding Mortality
Predicts mortality risk in upper GI bleeding.
Risk Scores · Updated 4/13/2026
BISAP Score for Pancreatitis Mortality
Mortality risk score in acute pancreatitis.
Risk Scores · Updated 4/13/2026
Bristol Stool Form Scale
Visually classifies stool into 7 types (hard pellets to watery) with clinical interpretation, gut transit time estimates, and management guidance for constipation and diarrhoea.
Gastrointestinal · Updated 4/13/2026
Child-Pugh Score
Cirrhosis severity: bilirubin, albumin, INR, ascites, encephalopathy. Classes A/B/C.
Liver · Updated 4/13/2026
Crohn's Disease Activity Index (CDAI)
Composite disease activity score for Crohn's disease.
Risk Scores · Updated 4/13/2026
Eckardt Score (Achalasia) Calculator
Esophageal achalasia severity index from weight loss, duration, dilatation, and sigmoid esophagus.
Esophageal · Updated 4/13/2026
Edinburgh Gastric Ulcer Score (EGUS)
Risk stratification aid in gastric ulcer context.
Risk Scores · Updated 4/13/2026
Estimated Mean Liver Span (MCL)
Height-adjusted rough percussion span estimate for adult context.
Physical Exam · Updated 4/13/2026
Forrest Classification (Upper GI Bleeding)
Endoscopic bleeding stigmata classification for peptic ulcer bleeding.
Classification Criteria · Updated 4/13/2026
Glasgow-Blatchford Bleeding Score (GBS)
Pre-endoscopy risk stratification for acute upper gastrointestinal bleeding.
Emergency Medicine · Updated 4/13/2026
Glasgow-Imrie Criteria (Acute Pancreatitis)
Severity criteria for acute pancreatitis.
Risk Scores · Updated 4/13/2026
Harmless Acute Pancreatitis Score (HAPS)
Identifies likely non-severe acute pancreatitis.
Risk Scores · Updated 4/13/2026
Harvey-Bradshaw Index (HBI)
Crohn's disease activity index.
Symptom Scores · Updated 4/13/2026
Hepatocellular carcinoma(HCC) Risk Calculator
Ioannou et al. model-inspired educational estimate of 3-year HCC risk using cirrhosis/SVR and lab/demographic inputs.
Liver · Updated 4/13/2026
IGERQ score
Infant Gastroesophageal Reflux Questionnaire (IGERQ) total score (simplified mapping) and interpretation using a score cut-off around 5.
Pediatrics · Updated 4/13/2026
Index of Severity in Eosinophilic Esophagitis (I-SEE)
Severity index for eosinophilic esophagitis.
Symptom Scores · Updated 4/13/2026
International Autoimmune Hepatitis Group (IAIHG) simplified score
IAIHG simplified AIH scoring using autoantibodies, IgG level, liver histology, and viral hepatitis exclusion (educational).
Liver · Updated 4/13/2026
Irritable Bowel Syndrome Diagnostic Criteria (Manning Criteria)
Manning criteria checklist for IBS; meets if >= 3/6 features are present (educational).
Gastrointestinal · Updated 4/13/2026
ISHAK scoring on liver histopathology
ISHAK necroinflammatory activity index (activity components summed) and fibrosis stage from histology selections (educational).
Liver · Updated 4/13/2026
King's College Criteria for Acetaminophen Toxicity and Indication for Liver Transplant
King's College criteria for acetaminophen-related ALF: meets if arterial pH < 7.30 OR (INR > 6.5 + creatinine > 3.4 + HE grade III/IV).
Liver Failure · Updated 4/13/2026
King's College Criteria for Non-Acetaminophen related acute liver failure and Indication for Liver Transplant
King's College criteria for non-acetaminophen ALF: meets if PT > 100s (INR > 6.5) OR >=3 of 5 minor criteria.
Liver Failure · Updated 4/13/2026
Kruis Score (Diagnosis of IBS)
Diagnostic support score for irritable bowel syndrome.
Diagnostic Scores · Updated 4/13/2026
Los Angeles (LA) Grading of Esophagitis
Endoscopic grading system for reflux esophagitis.
Classification Criteria · Updated 4/13/2026
Mayo Score / Disease Activity Index (DAI) for Ulcerative Colitis
Disease activity scoring in ulcerative colitis.
Disease Activity · Updated 4/13/2026
Montreal Classification for Inflammatory Bowel Disease (IBD)
Phenotypic classification framework for IBD.
Classification Criteria · Updated 4/13/2026
NAFLD (Non-Alcoholic Fatty Liver Disease) Activity Score
Kleiner 2005 NAS: steatosis grade + lobular inflammation + ballooning (0–8).
Hepatology · Updated 4/13/2026
Normal Values of Primary and Total Bile Acids
Educational simplified primary and total bile acid reference ranges.
Laboratory Medicine · Updated 4/13/2026
Oakland Score (Safe Discharge in Lower GI Bleed)
Risk score to support safe discharge decisions in acute lower GI bleeding.
Risk Scores · Updated 4/13/2026
Paediatric Crohn’s Disease Activity Index
Simplified educational PCDAI scoring based on selected clinical categories (0–100).
Inflammatory Bowel Disease · Updated 4/13/2026
Pediatric Ulcerative Colitis Activity Index (PUCAI)
PUCAI index (0–85) from daily symptoms: abdominal pain, rectal bleeding, stool consistency, stool frequency, nocturnal stools, and activity.
Inflammatory Bowel Disease · Updated 4/13/2026
Prague C & M Classification (Barrett's Esophagus)
Endoscopic extent classification for Barrett's esophagus.
Classification Criteria · Updated 4/13/2026
Ranson's Criteria (Pancreatitis Mortality)
Pancreatitis severity scoring using admission and 48-hour criteria.
Risk Scores · Updated 4/13/2026
Reflux Finding Score
Belafsky RFS from laryngoscopic findings; >7 suggests LPR on Pediatric Oncall.
GI and Liver Calculators · Updated 4/13/2026
Reflux Symptom Index
RSI from nine 0–5 symptom items; ≥13 clinically significant on Pediatric Oncall.
GI and Liver Calculators · Updated 4/13/2026
Rockall score for upper gastrointestinal bleeding
Pre-endoscopy Rockall (age, shock, comorbidity).
GI and Liver Calculators · Updated 4/13/2026
Rockall Score for Upper GI Bleeding (Complete)
Full Rockall score including endoscopic diagnosis and stigmata of recent hemorrhage.
GI and Liver Calculators · Updated 4/13/2026
Rome 4 Criteria for Abdominal Migraine
Simplified Rome IV abdominal migraine checklist.
GI and Liver Calculators · Updated 4/13/2026
Rome 4 Criteria for Aerophagia
Simplified Rome IV aerophagia checklist.
GI and Liver Calculators · Updated 4/13/2026
Rome 4 criteria for constipation
Functional constipation: ≥2 Rome criteria with duration and exclusion.
GI and Liver Calculators · Updated 4/13/2026
Rome 4 Criteria for Cyclic Vomiting Syndrome
Simplified Rome IV CVS checklist.
GI and Liver Calculators · Updated 4/13/2026
Rome 4 Criteria for Functional Abdominal Pain-NOS
Simplified FAP-NOS checklist.
GI and Liver Calculators · Updated 4/13/2026
Rome 4 Criteria for Functional Dyspepsia
Core Rome IV FD symptoms with duration.
GI and Liver Calculators · Updated 4/13/2026
Rome 4 Criteria for Functional Nausea and Functional Vomiting
Simplified FNVS-style checklist.
GI and Liver Calculators · Updated 4/13/2026
Rome 4 Criteria for Irritable Bowel Syndrome
Rome IV IBS checklist aligned with Pediatric Oncall structure.
GI and Liver Calculators · Updated 4/13/2026
Rome 4 Criteria for Nonretentive Fecal Incontinence
Simplified NFI checklist (age ≥4 years).
GI and Liver Calculators · Updated 4/13/2026
Rome 4 Criteria for Rumination Syndrome
Simplified Rome IV rumination checklist.
GI and Liver Calculators · Updated 4/13/2026
Rome II Diagnostic Criteria (IBS)
Symptom criteria checklist for IBS (Rome II).
Diagnostic Criteria · Updated 4/13/2026
Rome III Diagnostic Criteria (IBS)
Symptom criteria checklist for IBS (Rome III).
Diagnostic Criteria · Updated 4/13/2026
Rome IV Diagnostic Criteria (Belching Disorders)
Criteria checklist support for belching disorders.
Diagnostic Criteria · Updated 4/13/2026
Rome IV Diagnostic Criteria (Biliary Pain)
Criteria checklist support for biliary pain diagnosis.
Diagnostic Criteria · Updated 4/13/2026
Rome IV Diagnostic Criteria (Cannabinoid Hyperemesis Syndrome)
Criteria checklist support for CHS diagnosis.
Diagnostic Criteria · Updated 4/13/2026
Rome IV Diagnostic Criteria (Centrally Mediated Abdominal Pain Syndrome, CAPS)
Criteria checklist support for CAPS diagnosis.
Diagnostic Criteria · Updated 4/13/2026
Rome IV Diagnostic Criteria (Chronic Nausea Vomiting Syndrome, CNVS)
Criteria checklist support for CNVS diagnosis.
Diagnostic Criteria · Updated 4/13/2026
Rome IV Diagnostic Criteria (Fecal Incontinence)
Criteria checklist support for functional fecal incontinence diagnosis.
Diagnostic Criteria · Updated 4/13/2026
Rome IV Diagnostic Criteria (Functional Abdominal Bloating/Distension)
Criteria checklist support for functional bloating/distension diagnosis.
Diagnostic Criteria · Updated 4/13/2026
Rome IV Diagnostic Criteria (Functional Anorectal Pain)
Criteria checklist support for functional anorectal pain diagnosis.
Diagnostic Criteria · Updated 4/13/2026
Rome IV Diagnostic Criteria (Functional Biliary Sphincter of Oddi Disorder)
Criteria checklist support for functional biliary sphincter of Oddi disorder.
Diagnostic Criteria · Updated 4/13/2026
Rome IV Diagnostic Criteria (Functional Chest Pain)
Criteria checklist support for functional chest pain of presumed esophageal origin.
Diagnostic Criteria · Updated 4/13/2026
Rome IV Diagnostic Criteria (Functional Defecation Disorders)
Criteria checklist support for functional defecation disorders.
Diagnostic Criteria · Updated 4/13/2026
Rome IV Diagnostic Criteria (Functional Diarrhea)
Criteria checklist support for functional diarrhea diagnosis.
Diagnostic Criteria · Updated 4/13/2026
Rome IV Diagnostic Criteria (Functional Dysphagia)
Criteria checklist support for functional dysphagia diagnosis.
Diagnostic Criteria · Updated 4/13/2026
Rome IV Diagnostic Criteria (Functional Gallbladder Disorder)
Criteria checklist support for functional gallbladder disorder diagnosis.
Diagnostic Criteria · Updated 4/13/2026
Rome IV Diagnostic Criteria (Functional Heartburn)
Criteria checklist support for functional heartburn diagnosis.
Diagnostic Criteria · Updated 4/13/2026
Rome IV Diagnostic Criteria (Functional Pancreatic Sphincter of Oddi Disorder)
Criteria checklist support for functional pancreatic sphincter of Oddi disorder.
Diagnostic Criteria · Updated 4/13/2026
Rome IV Diagnostic Criteria (Globus)
Criteria checklist support for globus diagnosis.
Diagnostic Criteria · Updated 4/13/2026
Rome IV Diagnostic Criteria (Narcotic Bowel Syndrome)
Criteria checklist support for narcotic bowel syndrome diagnosis.
Diagnostic Criteria · Updated 4/13/2026
Rome IV Diagnostic Criteria (Opioid-Induced Constipation)
Criteria checklist support for opioid-induced constipation diagnosis.
Diagnostic Criteria · Updated 4/13/2026
Rome IV Diagnostic Criteria (Proctalgia Fugax)
Criteria checklist support for proctalgia fugax diagnosis.
Diagnostic Criteria · Updated 4/13/2026
Rome IV Diagnostic Criteria (Reflux Hypersensitivity)
Criteria checklist support for reflux hypersensitivity diagnosis.
Diagnostic Criteria · Updated 4/13/2026
Rome IV Diagnostic Criteria (Unspecified Functional Bowel Disorder)
Criteria checklist support for unspecified functional bowel disorder diagnosis.
Diagnostic Criteria · Updated 4/13/2026
Serum Ascites Albumin Gradient(SAAG)
SAAG = serum albumin minus ascites albumin (g/dL).
GI and Liver Calculators · Updated 4/13/2026
SES-CD (Simplified Endoscopic Score for Crohn's Disease)
Five bowel segments × three 0–3 subscores for ulcer burden.
Disease Activity · Updated 4/13/2026
Severity of Acute Pancreatitis Score
Pediatric severe acute pancreatitis feature count (≥3 flagged).
GI and Liver Calculators · Updated 4/13/2026
Stool Osmolar/Osmotic Gap
Fecal osmotic gap from electrolytes ± measured stool osmolality.
GI and Liver Calculators · Updated 4/13/2026
Travis Criteria (Acute Severe UC, Day 3 Steroids)
Stool frequency and CRP rule for IV-steroid failure / colectomy risk.
Risk Scores · Updated 4/13/2026
Truelove & Witts Severe Ulcerative Colitis
Classic severe attack definition using stool frequency and systemic markers.
Classification Criteria · Updated 4/13/2026
UCEIS (Ulcerative Colitis Endoscopic Index of Severity)
Endoscopic activity 0–8 (vascular, bleeding, mucosal surface).
Symptom Scores · Updated 4/13/2026

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