FIB-4 Index
Non-invasive liver fibrosis assessment.
years
U/L
U/L
×10⁹/L
FIB-4 Index
0.00
Low Risk
Low Risk
Unlikely advanced fibrosis (F0-F1). Repeat in 1-3 years.
Formula
FIB-4 = (Age × AST) / (Platelets × √ALT)
= (50 × 45) / (180 × √55) = 0.00
Interpretation
<1.3: Low risk (F0-F1)
1.3-2.67: Indeterminate
>2.67: High risk (F3-F4)
Frequently Asked Questions
How to Use
About the FIB-4 Calculator
What it calculates
This fib-4 calculator applies a validated clinical scoring method used in healthcare settings. Liver fibrosis staging.
When to use it
Use as a clinical decision support aid alongside professional judgment — not as a standalone diagnosis.
Example
Adjust the inputs above to model your specific scenario with the FIB-4 Calculator.
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