Conversion calculator
Convert fabric weight from grams per square meter to ounces per square yard with the exact 33.906 factor, with a reference table of common weights.
Fabric weight
5.31oz/yd²
| GSM (g/m²) | oz/yd² |
|---|---|
| 100 | 2.95 |
| 120 | 3.54 |
| 140 | 4.13 |
| 160 | 4.72 |
| 180 | 5.31 |
| 200 | 5.9 |
| 220 | 6.49 |
| 240 | 7.08 |
| 260 | 7.67 |
| 280 | 8.26 |
| 300 | 8.85 |
| 340 | 10.03 |
| 380 | 11.21 |
| 400 | 11.8 |
oz/yd² = GSM / 33.906
| Symbol | Meaning | Unit |
|---|---|---|
| GSM | Fabric weight | g/m² |
| 33.906 | Grams per square meter in 1 oz/yd² (28.3495 g / 0.836127 m²) | (g/m²)/(oz/yd²) |
The converter divides GSM by 33.906, the number of grams per square meter in one ounce per square yard. The factor comes from 28.3495 g per ounce divided by 0.836127 m² per square yard, so the result is exact rather than a rounded rule of thumb.
A buyer in the United States asks for the weight of a 240 GSM French terry in ounces.
240 / 33.906 = 7.08 oz/yd²
Use it when a tech pack, mill offer or test report quotes fabric weight in ounces, which is common for denim, canvas, twill and fabrics sold to North American programs. Keep both units on the specification so nobody converts again with a rounded factor. For the reverse direction, use the oz/yd² to GSM converter.
200 GSM is 200 divided by 33.906, which is 5.90 oz/yd².
No. Ounces per square yard is an area weight. Ounces per linear yard is the weight of one yard of fabric at its full width, so it depends on the width.
How to convert fabric weight between grams per square meter and ounces per square yard, where the 33.906 factor comes from, and why linear weight is a different number.
A practical reference of typical GSM ranges for knitted and woven apparel fabrics, what moves a fabric up or down the range, and how to use the chart when reviewing a specification.