Various yarn numbering systems and conversion formulas and tables for easy reference



English/Metric Conversion Table: Length

  Inch Yard Centimeter Meter
Inch   0.278 2.54 0.0254
Yard 36   91.44 0.9144
Centimeter 0.3937 0.011   0.01
Meter 39.37 1.094 100  



English/Metric Conversion Table: Mass/Force

  Ounce Pound Gram Centi-Newton Newton
Ounce   0.06237 28.3495 27.783 0.27802
Pound 15.96772   453.6 444.528 4.44528
Gram 0.0353 0.0022   0.98 0.0098
Centi-Newton 0.035904 0.002248 1.02   0.01
Newton 3.5904 0.2248 102 100  

English/Metric Conversion Table: Saturated Steam Gauge Pressures

  Pascal Kilo-Pascal Pounds per square inch
Pascal(Pa)   0.001 1.45
Kilo-Pascal(kPa) 1000   0.145
Pounds per square inch(Psi) 6895 6.895  

English/Metric Conversion Table: Tenacity

  gf/den gf/tex cN/tex Rkm
gf/den   9.015 8.838 9.015
gf/tex 0.111   0.9807 1
cN/tex 0.113 1.02   1.02
Rkm 0.111 1 0.9807  

Count Conversion Table

tex dtex den Nm NeC NeL
tex   dtex/10 den/9 1000/Nm 590.54/NeC 1653.5/NeL
dtex tex*10   den/0.9 10000/Nm 5905.4/NeC 16535/NeL
den tex*9 dtex*0.9   9000/Nm 5314.9/NeC 14882/NeL
Nm 1000/tex 10000/dtex 9000/den   NeC*1.6934 NeL*0.6048
NeC 590.54/tex 5905.4/dtex 5314.9/den Nm*0.5905   NeL/2.8
NeL 1653.5/tex 16535/dtex 14882/den Nm*1.6535 NeC*2.8  

Special Conversions

  • TF = 95.67315 TM
  • TM = 0.010452 TF

  • Turns per inch t.p.i = 0.0254 * t.p.m
  • Turns per meter t.p.m = 39.37 * t.p.i

  • Fahrenheit °F = 1.8 * °C + 32
  • Centigrade °C = 0.5556 * (°F - 32)

  • Tkt Nm = 3000/Tkt tex
  • Tkt tex = 3000/Tkt Nm

  • m/kg = 2.016*yd/lb
  • yd/lb = 0.496*m/kg

  • yd2 = 0.836 m2
  • m2 = 1.196 yd2

  • oz/yd2 = 33.9* g/m2
  • g/m2 = 0.0295* oz/yd2

  • th/cm = 0.3937* th/in
  • th/in = 2.54* th/cm