Plying Calculator

Singles twist and plying twist for balanced yarn.

Singles TPI

Number of plies

Singles WPI

Desired finished yards

Twist take-up (%)

Tab to move between fields

Plying TPI

5.66

Plied yarn WPI14.1

Total singles needed (yd)444

Singles per ply (yd)222

Plied yards per pound10,000

Finished yarn weight (oz)0.32

Yarn WeightDK

How to Use This Calculator

Enter the twist per inch (TPI) of your singles yarn — count twists in a 1-inch section.
Set the number of plies you are combining.
Enter the WPI (wraps per inch) of the singles yarn.
Enter the desired finished yards of plied yarn and the twist take-up percentage (typically 5–15%).
Read the recommended plying TPI for a balanced yarn and the total singles yardage needed across all plies.
Use the singles yards per ply output to prepare equal-length bobbins before starting to ply.

How the result changes with Singles TPI

Plying TPI: Recommended plying twist per inch for balanced yarn (singles TPI / √plies).
Plied yarn WPI: Expected wraps per inch of the finished plied yarn.
Total singles needed (yd): Total singles yardage needed across all plies including take-up.
Singles per ply (yd): Singles yardage needed for each individual ply.
Plied yards per pound: Estimated yards per pound of the finished plied yarn.
Finished yarn weight (oz): Approximate weight of the finished plied yarn.

Identify Input Parameters
4 parameters
Singles TPI = 8, Number of plies = 2, Singles WPI = 20, Desired finished yards = 200 = 5 input(s) provided
Calculate Plying TPI
Plying TPI = singlesTpi / sqrt(plies)
5.66 = 5.66
Calculate Plied yarn WPI
Plied yarn WPI = singlesWpi / sqrt(plies)
14.1 = 14.1
Calculate Total singles needed
Total singles needed = singlesYardsPerPly * plies
444 = 444