From tex to decitex or from decitex to tex? The Textile Unit Calculator is a unit converter that helps you to convert textile units quickly and accurately.

In the first field, please enter the value to be converted by selecting your base unit. In the second field, you can select the target unit into which your base unit should be converted. The Textile Unit Calculator then automatically outputs the converted value.


Thread thickness is expressed in a wide variety of measurement units and numbering systems. Common to them all is that they give the weight of the thread over a defined length. The most important international systems for numbering sewing threads are:
Thread Weight in tex
The tex count tells us how many grams 1.000 m of a single yarn weigh. Or, put another way: 1 tex is the size, at which a strand or a yarn of length 1 km weighs 1 g. 1 tex = 1 g/km.
Formula: 1.000 : Nm = tex
Example: A single yarn is Nm 40 (40 m weigh 1 g). A 1.000-meter-long yarn of this size therefore weighs: 1.000 m : 40 = 25 g. Its designation is 25 tex.

Ticket number – No. / Tkt.
The ticket number is universally utilized as the description for the thickness of a sewing thread, normally using the abbreviations No. or Tkt. or No./Tkt. In fact the ticket number is a development of the Nm, but does not inform about the folding number. It is not apparent, from how many individual threads the ply-yarn has been produced. “No.” or “Tkt.”.
Example: Mara 120 = No./Tkt. 120 = 25 tex

Metric counting – Nm
Number metric with the symbol Nm informs about how many meters of a single yarn weigh 1 gram.
Example: Nm 120/1 – i.e.: 120 m weigh 1 g

English cotton count – NeB
Sewing yarns made of cotton are classified according to the English cotton-count system, with the abbreviation NeB. The NeB reveals how many hanks, each of length 840 yards (768,08 m) weigh one lb (English pound = 451,59 g).
Formula: NeB = Number of hanks à 840 yds / 1b
Example: 60 hanks of cotton yarn, that weigh 1 English pound, give the NeB 60.
Known value   Desired value
    tex Nm NeB
tex tex 1.000/tex 590/tex
Metric count Nm 1.000/Nm 0,59 x Nm
English cotton count NeB 590/NeB 1.693 x NeB