Tex Count Calculator

Tex Count Calculator

Working with international yarn specs? This calculator computes yarn fineness in Tex, the standard direct yarn numbering system.

Tex = Mass(grams) / Length(km)

Example

A yarn sample weighing 30 grams for 1 kilometer of length:

Tex = 30/1 = 30.0 Tex

Direct vs. Indirect Yarn Numbering Systems

Tex is a "direct" yarn numbering system where a higher number means a thicker, heavier yarn - this is the opposite relationship of "indirect" systems like English cotton count (Ne), where a higher number instead means a finer, thinner yarn.

Why This Confuses People Switching Systems

This inverted relationship is exactly why converting between Tex and Ne (or other indirect systems) trips up textile professionals moving between US and international sourcing - always double-check which system a supplier's spec sheet uses before assuming yarn thickness based on the raw number alone.