Crimp Calculator
Crimp is the extra yarn length taken up by interlacing: a yarn of 21.6 cm removed from 20 cm of fabric has crimp = 8 %.
8.00000000000001 %
Full answer, then cut to fewer decimals (not rounded):
- 8.00000000000001 %
- 8.0000000000000 %
- 8.000000000000 %
- 8.00000000000 %
- 8.0000000000 %
- 8.000000000 %
- 8.00000000 %
- 8.0000000 %
- 8.000000 %
- 8.00000 %
- 8.0000 %
- 8.000 %
- 8.00 %
- 8.0 %
- Contraction (ly − lf)/ly
- 7.40741 %
- Crimp ratio ly/lf
- 1.08
Step-by-step solution
- Crimp = (yarn length − fabric length) ÷ fabric length × 100
- = (21.6 − 20) ÷ 20 × 100 = 8 %
Crimp Formula
c = (ly − lf) ÷ lf
Peirce: l = p(1 + c), h ≈ (4/3)p√c, θ ≈ 106√c degrees
Worked Example
A yarn that measures 21.6 cm straightened from a 20 cm strip of fabric:
- Crimp = (yarn length − fabric length) ÷ fabric length × 100
- = (21.6 − 20) ÷ 20 × 100 = 8 %
Crimp ratio ly/lf: 1.08
More Fabric Manufacture and Structure Calculators
-
Fabric GSM Calculator
GSM = [EPI(1 + c₁)tex₁ + PPI(1 + c₂)tex₂] × 39.37 ÷ 1000
c crimp, tex = 590.5/Ne
Example: A 100 × 60 fabric in 30s × 30s cotton with 8 % warp and 5 % weft crimp: Fabric weight = 132.523 g/m².
-
Cover Factor Calculator
Kc = K₁ + K₂ − K₁K₂/28
K = n√tex/10, n threads per cm; English K = EPI/√Ne; 28 is full cover
Example: A 100 × 60 fabric in 30s × 30s yarn: Cloth cover factor Kc = 21.41.
-
Knitted Fabric Calculator
cpc = kc/ℓ, wpc = kw/ℓ, S = cpc × wpc
ℓ loop length (cm); TF = √tex/ℓ (mm); GSM = S ℓ tex/10
Example: Plain jersey knitted from 30s yarn with a 3 mm loop length (dry relaxed): Fabric weight = 124.67 g/m².
Frequently asked questions
What is the difference between crimp and contraction?
Crimp divides the excess length by fabric length; contraction divides it by yarn length, so contraction is always slightly smaller.
What is crimp interchange?
Stretching a woven fabric in one direction straightens those yarns and increases crimp in the other set.
Sources
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Crimp Calculator. Retrieved October 25, 2026, from https://scientificconverters.com/calculators/crimp-calculator/
IEEE
Scientific Converters, "Crimp Calculator," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/calculators/crimp-calculator/