Fiber & Raw Material Engineering

Fiber Quality Index (FQI) Calculator

Enter HVI bale data. The index and its components recalculate on every change.

Length HVI fibrogram
mm
%
Strength & Fineness HVI bundle test
g/tex
mic

Fiber Quality Index

—

Length x Strength x Uniformity / Micronaire

Component Metrics

ATIRA FQI (Length x Strength / Mic)
—
Effective (Mean) Length
— mm
Strength per Micronaire Unit
— g/tex

FQI ranks lots relative to one another; absolute values vary with the HVI calibration cotton in use. Confirm against your own spinning trials.

Fiber Quality Index (FQI) Calculator — free, with the formula and a worked example, at Textile School.