Plying calculator.
Work out how much plied yarn your singles will make, and find a balanced plying-twist starting point before you sit down at the wheel.
Finished yardage
A rough estimate. Plying takes up roughly 5–10% in length, so expect a little less than the figure shown.
Balanced plying twist
For a balanced 2-ply, aim for roughly two-thirds of the singles twist in the opposite direction. Treat the result as a starting point and confirm with a ply-back test.
How plying changes your yarn
When you ply, two or more singles become one strand, so the finished yarn is shorter than the total length of singles that went into it. A 2-ply is roughly half the length of your two singles combined; a 3-ply roughly a third. The yarn also gets thicker and, once balanced, stronger and more even.
Getting the twist right is the other half of plying. Add too little and the yarn stays under-plied and loose; add too much and it kinks back on itself. The two-thirds rule of thumb above is a good place to begin for a 2-ply. The surest test is a ply-back: let a length of singles twist back on itself and match your plying twist to how it sits.
Plan every ply with confidence.
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