Knitted Fabric Calculator
Munden showed that relaxed knit dimensions depend only on loop length: plain jersey of 30s yarn with ℓ = 3 mm weighs 124.67 g/m².
Plain jersey: dry relaxed ≈ 5.0, fully relaxed ≈ 5.3.
Plain jersey: dry relaxed ≈ 3.8, fully relaxed ≈ 4.1.
124.669818905739 g/m²
Full answer, then cut to fewer decimals (not rounded):
- 124.669818905739 g/m²
- 124.66981890573 g/m²
- 124.6698189057 g/m²
- 124.669818905 g/m²
- 124.66981890 g/m²
- 124.6698189 g/m²
- 124.669818 g/m²
- 124.66981 g/m²
- 124.6698 g/m²
- 124.669 g/m²
- 124.66 g/m²
- 124.6 g/m²
- Courses per cm = kc/ℓ
- 16.6667
- Wales per cm = kw/ℓ
- 12.6667
- Stitch density S = ks/ℓ²
- 211.111 loops/cm²
- Tightness factor TF = √tex/ℓ (mm)
- 1.4789
- Loop shape factor kc/kw
- 1.3158
- Courses per inch
- 42.3333
- Wales per inch
- 32.1733
Step-by-step solution
- cpc = kc/ℓ = 5 ÷ 0.3 cm = 16.6667; wpc = 12.6667
- S = cpc × wpc = 211.111 loops/cm²
- GSM = S × ℓ(cm) × tex ÷ 10 = 211.111 × 0.3 × 19.6847 ÷ 10 = 124.67 g/m²
Knitted Fabric Formula
cpc = kc/ℓ, wpc = kw/ℓ, S = cpc × wpc
ℓ loop length (cm); TF = √tex/ℓ (mm); GSM = S ℓ tex/10
Worked Example
Plain jersey knitted from 30s yarn with a 3 mm loop length (dry relaxed):
- cpc = kc/ℓ = 5 ÷ 0.3 cm = 16.6667; wpc = 12.6667
- S = cpc × wpc = 211.111 loops/cm²
- GSM = S × ℓ(cm) × tex ÷ 10 = 211.111 × 0.3 × 19.6847 ÷ 10 = 124.67 g/m²
Wales per cm = kw/ℓ: 12.6667 · Stitch density S = ks/ℓ²: 211.111 loops/cm² · Tightness factor TF = √tex/ℓ (mm): 1.4789 · Loop shape factor kc/kw: 1.3158 · Courses per inch: 42.3333 · Wales per inch: 32.1733
More Fabric Manufacture and Structure Calculators
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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.
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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.
-
Crimp Calculator
c = (ly − lf) ÷ lf
Peirce: l = p(1 + c), h ≈ (4/3)p√c, θ ≈ 106√c degrees
Example: A yarn that measures 21.6 cm straightened from a 20 cm strip of fabric: Crimp = 8 %.
Frequently asked questions
What are typical tightness factors for single jersey?
About 1.3–1.6 (√tex/ℓ with ℓ in mm); 1.47 is often taken as optimum for cotton plain jersey.
Do Munden constants change with relaxation?
Yes: they rise from dry relaxed to fully relaxed, so courses and wales per cm increase after washing.
Sources
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
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APA
Scientific Converters. (2026, October 15). Knitted Fabric Calculator. Retrieved October 25, 2026, from https://scientificconverters.com/calculators/knitted-fabric-calculator/
IEEE
Scientific Converters, "Knitted Fabric Calculator," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/calculators/knitted-fabric-calculator/