Yarn Spinning & Preparation

Count Strength Product (CSP) Calculator

CSP lets you compare strength across counts. Always quote it with the target it is being judged against.

Lea Test 120 yd skein
lb
Ne
Specification Contract target

Count Strength Product

—

Lea strength in pounds x English count

Quality Position

Lea Strength
— kgf
Linear Density
— tex
Variance from Target
—
Quality Index vs Target
— %

CSP depends on the tester, humidity and skein preparation. Compare only figures produced under the same standard atmosphere of 20C and 65% RH.

Count Strength Product (CSP) Calculator — free, with the formula and a worked example, at Textile School.