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sci.yarn-count-conversion Calculator
Converts between yarn count systems: tex (g/km), dtex (g/10km), denier (g/9km), and English count Ne (840 yd/lb). 1 tex = 9 denier = 10 dtex; Ne = 590.5/tex — finer yarns have higher Ne and lower tex.
Inputs
Tex Count
Reference formula or conversion factor shown for context.
Twist Turns Per M
Reference formula or conversion factor shown for context.
Fibre Density G Cm3
Mass per unit volume (kg/m³). Water: 1,000. Air: 1.225. Steel: 7,850. Affects buoyancy, flow, and structural loads.
Results
English count Ne (cotton)
Total number of items or occurrences.
metric count Nm
Total number of items or occurrences.
decitex (dtex)
Reference formula or conversion factor shown for context.
yarn diameter (mm, approx)
The computed diameter -- twice the radius.
twist factor αm = T/√Nm
A dimensionless multiplier applied in the calculation.