APRI
APRI = (AST / AST upper limit of normal) × 100 / platelets (10⁹/L).
Calculator
How it works
APRI is a simple serum marker ratio used to estimate likelihood of significant hepatic fibrosis.
Limits
Acute hepatitis, hemolysis, and alcohol binge can shift AST and platelets independently.
Educational tool only—not for diagnosis or treatment decisions.