FIB-4 Index (Fibrosis)
Calculate FIB-4 Index (Fibrosis) instantly with the exact formula and a worked example.
FIB-4 Index (Fibrosis)
Ageyears
ASTU/L
ALTU/L
Platelets×10⁹/L
FIB-4
1.67
Advanced fibrosis in NAFLD
Indeterminate
Advanced fibrosis in HCV/HIV
Indeterminate
More about: FIB-4 Index (Fibrosis)
What it calculates
The “FIB-4 Index (Fibrosis)” calculator computes FIB-4 from 4 parameters: age (years), ast (U/L), alt (U/L), platelets (×10⁹/L).
A professional calculation for specialists.
Example calculation
With parameters Age = 50 years, AST = 40 U/L, ALT = 36 U/L, Platelets = 200 ×10⁹/L the result is 1.67 (NAFLD: <1.30 and >2.67 (from age 65 the lower cut-off is 2.0)).
How to use
- Enter age, ast, alt and platelets — each field above is adjustable with a slider.
- FIB-4 is calculated automatically as you type.
- Check the worked example below to see the formula applied to real numbers.
- Copy the result or bookmark this calculator.
Related calculators
FAQ
How is FIB-4 Index (Fibrosis) calculated?
The FIB-4 Index (Fibrosis) calculator computes FIB-4 from age, ast, alt, platelets. Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the FIB-4 Index (Fibrosis) calculator free?
Yes. It is completely free, needs no signup, runs entirely in your browser, and sends no data to any server.
More calculators in this category
Explore related free tools