Yarn Count (Tex)
Compute a yarn's count in the Tex system, Tex = (mass in grams / length in meters) · 1000, i.e. the mass in grams of 1000 meters of the yarn. It is a 'direct' system (the higher the number, the thicker the yarn), standardized internationally. Tex links mass to length — the fundamental quantity defining yarn fineness and influencing strength, hand and fabric weight. Enter the mass and length of the yarn sample.
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Yarn count (Tex)
How do you measure the 'thickness' of a yarn whose diameter is irregular? The textile industry solves this with the mass/length ratio. In the Tex system, the count is the mass in grams of 1000 meters of yarn: Tex = (mass/length)·1000. It is a direct and intuitive system — thicker yarn, bigger number — and it is the SI-aligned textile standard. Variants: the decitex (dtex, per 10,000 m) is common for filaments. Yarn count is the most fundamental quantity in spinning: it determines how many yarns fit in a fabric, its strength, its hand (feel) and, combined with thread density, the final fabric weight per unit area (grammage). Enter the mass and the length of the yarn sample.
Related Tools
Tex ↔ Ne Conversion
Convert a yarn count from the Tex (direct) system to Ne (English count, indirect), Ne = 590.5/Tex. In the Ne system, unlike Tex, the higher the number the <em>finer</em> the yarn — so they are inversely proportional. Ne is traditional in cotton spinning. The conversion is essential to compare yarns specified in different systems. Enter the count in Tex.
Yarn Twist (TPM)
Compute a yarn's twist in turns per meter (TPM) by dividing the number of turns by the length. Twist is what holds the fibers together and gives the yarn strength: too little produces a weak, fuzzy yarn; too much, a hard yarn prone to kinking. The direction (S or Z) and twist level define the yarn's character — knitting yarns are low-twist, crepe yarns high. Enter the number of turns and the length.
Fabric Cover Factor
Compute a fabric's cover factor, CF = thread density (threads/cm) · √(Tex), an index of how 'closed' the weave is — how much the threads cover the area, leaving more or fewer open spaces. High factors indicate dense, opaque fabrics (canvas, twill); low ones, sheer, breathable fabrics (voile, mesh). It influences air permeability, opacity and strength. Enter the thread density and the count in Tex.
Bond Yield (Coupon)
Estimates approximate yield-to-maturity of a coupon bond from face, price, and term.
Aggregate Fineness Modulus
Calculates the fineness modulus of an aggregate by adding the cumulative percentages retained on the eight standard sieves and dividing by one hundred. Note that the input is the CUMULATIVE retained percentage, not the passing nor the individual retained — that is where the calculation usually goes wrong. Concrete sand normally lands between 2.2 and 3.1. Enter the eight percentages.
Fabric Thread Count
Compute a woven fabric's thread density by adding the warp threads (lengthwise) and weft threads (widthwise) per centimeter. It is an indicator of construction and quality: higher density usually means a firmer, more durable and fuller fabric. It appears on spec sheets as 'threads/cm' or 'thread count'. Enter the warp and weft threads per cm.
The results provided by this tool are for general informational and educational purposes only and do not constitute professional, financial, medical, legal, tax or accounting advice. Always confirm important decisions with a qualified professional and official sources.