Calculate. Understand. Troubleshoot. Test. Improve.
Calculators, formulas, defect guides, testing notes and templates for people who make fabric and garments. Work out the number, find the cause, apply the fix.
Technical notes
Quality & DefectsGuide3 min read
AQL sampling decides how many garments to inspect from a lot and how many defects are allowed. How the sampling tables work, inspection levels, code letters, accept and reject numbers, and what AQL does and does not guarantee.
Read the noteQuality & Defects3 min read
Quality & Defects3 min read
Industrial Engineering3 min read
Merchandising & Costing3 min read
Fabric & Yarn7 min read
Fabric & Yarn7 min read
Garment Production3 min read
Fabric & Yarn7 min read
Testing9 min read
Merchandising & Costing4 min read
Tools
Every tool shows its formula, the working and the assumptions behind the answer.
GSM = W / A × 10,000Efficiency % = (output × SMV) / (manpower × working minutes) × 100Operation SMV = observed seconds / 60 × rating / 100 × (1 + allowance / 100)kg/dozen = (body length + sleeve length + allowance) × (½ chest + allowance) × 2 × GSM × 12 / 10,000,000Accept the lot if defectives found ≤ Ac; reject if ≥ ReTarget = manpower × working minutes × efficiency / SMVTex = 590.54 / Ne = 1000 / Nm = Denier / 9 = dtex / 10CM per piece = SMV × cost per minute / efficiencyDHU = total defects / units inspected × 100Marker efficiency % = pattern area / (marker length × marker width) × 100Thread per piece (m) = Σ(seam length × ratio) / 100 × (1 + wastage / 100)Dimensional change % = (after - before) / before × 100Weigh a cut sample. GSM updates as you type.
Fabric weight180.0g/m²
5.31 oz/yd²
GSM = weight ÷ area × 10,000. A 100 cm² cutter gives weight × 100.
Full GSM calculator with woven and knit estimatesKnowledge areas
Factory problem finder
Pick the symptom. Each guide lists likely causes by machine, material, method and operator.
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Quick reference
GSM = W / A × 10,000oz/yd² = GSM / 33.906 and GSM = oz/yd² × 33.906Tex = 590.54 / Ne = 1000 / Nm = denier / 9 = dtex / 10GSM ≈ 39.37 × [EPI × (1 + C1) × T1 + PPI × (1 + C2) × T2] / 1000GSM ≈ CPI × WPI × 1550 × stitch length (mm) × tex / 1,000,000Dimensional change % = (after - before) / before × 100Root cause guides
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