Fiber & Raw Material Engineering

Cotton Micronaire to Denier & Tex Converter

Micronaire is airflow resistance, not a true fineness. Correct it with maturity ratio to compare cottons on equal terms.

Airflow Reading HVI micronaire
ug/inch
Maturity Correction Optional
0.85
0.5 1.2

Linear Density

— den

Grams per 9000 metres of a single fibre

Equivalent Units

Tex
— tex
Millitex (apparent fineness)
— mtex
Standard Fineness (maturity corrected)
— mtex
Fibres in a 1 tex Cross-section
— no.

Micronaire confounds fineness with maturity. Two cottons sharing a micronaire can differ widely in true fineness, which is why the corrected figure matters for spinning limits.

Cotton Micronaire to Denier & Tex Converter — free, with the formula and a worked example, at Textile School.