Determine exact Grams per Square Meter (GSM) and oz/yd² from swatch scale weights or full mill roll invoices. Classify cloth into lightweight, medium, or heavyweight standards.
Use a 0.01g precision digital kitchen or lab scale for best accuracy.
Deduct cardboard core tube weight (approx. 0.8 - 1.2 kg) from gross weight.
GSM = Weight (g) ÷ Area (m²) = [ Weight (g) × 10,000 ] ÷ [ Length (cm) × Width (cm) ]
Ounces per square yard conversion: oz/yd² = GSM ÷ 33.906
Standard weight ranges used by fabric importers and garment exporters in Kathmandu
| Fabric Category | Typical GSM Range | Weight Class | Common Apparel Usage | Action |
|---|---|---|---|---|
| Chiffon / Georgette | 40 - 70 | Lightweight | Dupattas, Sarees, Sheer Scarves | |
| Cotton Voile / Lawn | 70 - 100 | Lightweight | Summer Kurtis, Linings | |
| Poplin / Shirting Cotton | 110 - 140 | Medium | Formal Office Shirts, School Shirts | |
| Single Jersey (T-Shirt) | 160 - 200 | Medium | Round-neck T-Shirts, Polos | |
| Suiting Poly-Viscose (PV) | 220 - 280 | Medium-Heavy | Blazers, Trousers, Safari Suits | |
| French Terry / Fleece | 280 - 360 | Heavyweight | Winter Hoodies, Sweatshirts | |
| Denim Twill (12 - 14 oz) | 400 - 480 | Heavyweight | Jeans, Heavy Jackets |
Eliminate supplier fabric disputes. ByaparOS records lab GSM test certificates, shade lot swatches, and wash shrinkage % directly on Bill of Materials tickets.
Fabric GSM formulas, testing methods, and standards