Yarn Numbering System

Topics: Imperial units, Conversion of units, Customary units in the United States Pages: 20 (1300 words) Published: August 23, 2011
Yarn numbering systems
Tex-System

Swicofil indicates the counts of their yarns by means of the Tex-system.

Tex Units

Term
Definition

Basic Tex Unit [tex]
Mass of yarn in grams per 1000 meters length

Decimal fraction
Mass of yarn in grams per 10'000 meters length

Decitex [dtex]
1 g / 10'000 m = 1/10 tex
Decitex is the count grading for filament and spinning yarns recognized by all international bodies in the man-made fibres industry.

Decimal multiple
Mass in kilograms per 1000 meters length.

Kilotex [ktex]
1 kg / 1000 m = 1000 tex)
Kilotex is used to state the counts of spinning tow and similar semi-finished and finished products.

Other numbering Systems

Count denier [den]
Mass of yarn in grams for length of 9000 meters

Metric yarns number [Nm]
Length in meters per 1 gram of mass

English cotton yarn number [Ne or ECC)]
Number of 840 yards strands per 1 English pound of mass

Wool runs
Number of 1600 yards strands per 1 English pound of mass

Wool, worsted (NeK)
Number of 560 yards strands per 1 English pound of mass

Wool, woolen measure (NeS)
Number of 256 yards strands per 1 English pound of mass

Linen Count (NeL or Lea)
Number of 300 yards strands per 1 English pound of mass

Spun Silk
Number of 840 yards strands per 1 English pound of mass

An interactive Conversion table can be found here
Worsted wool is nothing to do with worsted weight yarn. Worsted wool is wool which is carded and combed so that all the fibres are parallel. Woolen measure or Yorkshire wool is carded but not combed, so is a little rougher. Worsted wool is usually very fine and used for suits and fine fabric. Hand knitting yarn is usually woolen type yarn. When quoting wool some manufacturers specify "worsted" or "woolen". Most do not!

Conversion Formulas for the various numbering systems

convert
into
known
tex
decitex
(dtex)
denier
(den)
Metric No.
(Nm)
English Cotton No.
(Ne)

tex

10 x tex
9 x tex
1000
tex
591
tex

decitex
(dtex)
dtex
10

0.9 x dtex
10000
dtex
5910
dtex

denier
(den)
den
9
den
0.9

9000
den
5314
den

Metric No.
(Nm)
1000
Nm
10000
Nm
9000
Nm

0.59 x Nm

English Cotton No.
(Ne)
591
Ne
5910
Ne
5314
Ne
Ne x 1.69

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Yarn count conversion

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Conversion Factors
To Convert
To
Multiply by

Length

inches
millimeters
25.4

inches
feet
0.0833

feet
inches
12*

feet
meters
0.3048

feet
yards
0.3333

feet
miles (U.S. statute)
0.0001894

yards
yards
3*

yards
miles (U.S. statute)
0.0005682

miles (U.S. statute)
feet
5280*

miles (U.S. statute)
yards
1760*

miles (U.S. statute)
meters
1609

miles (U.S. statute)
nautical miles
0.868

meters
feet
3.281

meters
yards
1.094

meters
miles (U.S. statute)
0.0006214

nautical miles
miles (U.S. statute)
1.152

Area

square inches
square centimeters
6.452

square inches
square feet
0.006944

square feet
square inches
144*

square feet
square meters
0.09290

square meters
square feet
10.76

square miles
square yards
3,097,600*

square yards
square feet
9*

Volume

cubic inches
cubic centimeters
16.39

cubic inches
cubic feet
0.0005787

cubic feet
cubic inches
1728*

cubic feet
cubic meters
0.02832

cubic feet
U.S. gallons
7.481

cubic meters
cubic feet
35.31

liters
quarts (U.S. liquid)
1.057

quarts (U.S. liquid)
liters
0.9463

U.S. gallons
barrels (petroleum)
0.02381

U.S. gallons
cubic feet
0.1337

U.S. gallons
Imperial gallons
0.8327

barrels (petroleum)
U.S. gallons
42*

Imperial gallons
U.S. gallons
1.201

milliliters
cubic centimeters
1*

Time

seconds
minutes
0.01667

seconds
hours
0.0002778

seconds
days
0.00001157

minutes
seconds
60*

minutes
hours
0.01667

minutes
days...