GI & Hepatology Calculators
Interactive, evidence-based calculators for gastroenterology and hepatology clinical decision support. For educational use.
Medical Disclaimer: These tools and content are for educational purposes only and do not replace clinical judgment, institutional protocols, or current guidelines. Always apply professional expertise and consult appropriate resources when managing individual patients.
MELD-Na Score
Model for End-Stage Liver Disease with Sodium — predicts 3-month survival in cirrhosis.
Enter all values to calculate
Kim et al., Hepatology 2008; OPTN/UNOS Policy
FIB-4 Index
Non-invasive fibrosis assessment for MASLD/MASH and chronic liver disease using routine labs.
Enter all values to calculate
Shah et al., Hepatology 2009; AASLD MASLD Guidance 2023
Maddrey's Discriminant Function
Severity assessment for alcoholic hepatitis. Guides corticosteroid decision-making.
Enter all values to calculate
Maddrey WC et al., Gastroenterology 1978; AASLD ALD Practice Guidance 2019; ACG Clinical Guideline ALD 2018
Glasgow-Blatchford Score
Pre-endoscopy risk stratification for acute upper GI bleeding. Predicts need for intervention.
Blatchford et al., Lancet 2000; NICE Guidance NG141
Shock Index
Rapid pre-endoscopy hemodynamic triage for GI bleeding. SI = Heart Rate ÷ Systolic BP.
Enter heart rate and systolic BP to calculate
Saltzman JR et al.; ACG Clinical Guideline UGIB 2021; Strate LL et al., ACG Clinical Guideline LGIB 2023
Rome IV IBS Criteria
Diagnostic checklist for Irritable Bowel Syndrome per Rome IV criteria (2016), including subtype classification.
Core Diagnostic Criteria
Subtype Classification (Bristol Stool Scale)
Alarm Features (check any that apply)
Lacy et al., Gastroenterology 2016 (Rome IV)
Medical Disclaimer: These tools and content are for educational purposes only and do not replace clinical judgment, institutional protocols, or current guidelines. Always apply professional expertise and consult appropriate resources when managing individual patients.