Fabric Weight Converter
Convert fabric weight between GSM and oz per square yard.
Essential for textile and garment professionals.
Type in either field — the other updates instantly.
Fabric weight describes how heavy a fabric is per unit area. It is the most common way to compare fabric thickness and quality.
GSM (grams per square meter) is the international standard. oz/yd² (ounces per square yard) is used mainly in the US.
Conversion formula:
- GSM = oz/yd² × 33.906
- oz/yd² = GSM ÷ 33.906
Common fabric weights:
| Fabric Type | GSM | oz/yd² |
|---|---|---|
| Chiffon, voile | 30–70 | 0.9–2.1 |
| Cotton shirting | 100–150 | 2.9–4.4 |
| Denim (lightweight) | 150–200 | 4.4–5.9 |
| T-shirt jersey | 150–200 | 4.4–5.9 |
| Sweatshirt fleece | 250–350 | 7.4–10.3 |
| Denim (heavyweight) | 350–500 | 10.3–14.7 |
| Canvas | 400–700 | 11.8–20.6 |
Quick guideline:
- Under 150 GSM: lightweight (blouses, linings)
- 150–350 GSM: medium weight (t-shirts, dresses, pants)
- Over 350 GSM: heavyweight (outerwear, upholstery)