This is the standard lab/mill-floor method: wind a known length of yarn, weigh it, and calculate the count. Used daily to verify spun yarn against the target count.

Enter your measured sample

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Formula used

This is the calculation most students get wrong: the resultant count of plied/folded yarn is not simply the single count divided by the number of plies in every case — it follows the reciprocal rule below, which matters especially when plying yarns of different counts together.

Enter each single yarn's count (Ne)

Result

Formula used

Used to predict the yarn count that will come off the ring frame, based on the roving count fed in and the draft applied during spinning.

Enter spinning process data

Result

Formula used