Health

FIB-4 Calculator

Non-invasive liver fibrosis assessment.

Age (years)

AST (IU/L)

ALT (IU/L)

Platelet Count (10⁹/L)

FIB-4 Score—

Fibrosis Risk—

FIB-4 = (Age × AST) / (Platelet × √ALT)
<1.30: Low risk | 1.30–2.67: Indeterminate | >2.67: Advanced fibrosis likely