Convert GSM to ounces per square yard, square foot, or square meter and get fabric weight in oz/yd², oz/ft², or oz/m² for textile specs.
Quick overview: GSM to oz
GSM expresses fabric mass per unit area in the metric system as grams per square meter. In many textile specifications, fabric weight is also listed in ounces per square yard (oz/yd²), ounces per square foot (oz/ft²), or ounces per square meter (oz/m²).
- For oz/yd²: oz/yd² ≈ GSM ÷ 33.9057
- For oz/ft²: oz/ft² ≈ GSM ÷ 305.15
- For oz/m²: oz/m² ≈ GSM ÷ 28.3495
- 100 GSM ≈ 2.95 oz/yd²
Enter GSM, choose the desired output unit and select Calculate. The calculator uses exact international length and avoirdupois ounce definitions; the displayed article factors are rounded.
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GSM to Oz Formula
The following formula is used to convert grams per square meter to ounces per square yard.
Variables:
- oz/yd² is the fabric weight in ounces per square yard
- GSM is the fabric weight in grams per square meter
Additional conversion formulas are also commonly used:
- oz/ft² ≈ GSM / 305.1517
- oz/m² ≈ GSM / 28.3495
To convert GSM to ounces, divide the GSM value by the conversion constant for the selected area unit.
What is GSM to Oz Conversion?
GSM to oz conversion is the process of translating a fabric weight given in the metric system into an ounce-based area measurement. GSM tells you how many grams a fabric weighs per square meter, while oz/yd², oz/ft², and oz/m² express that same weight using ounces over different area units. This is useful when comparing fabric specifications across suppliers, regions, or industries that use different measurement systems.
How to Convert GSM to Oz?
The following steps outline how to convert GSM to ounces.
- First, determine the fabric weight in grams per square meter (GSM).
- Next, choose the output unit: ounces per square yard, ounces per square foot, or ounces per square meter.
- Then divide the GSM value by the proper conversion constant for that unit.
- Finally, check your answer with the calculator above.
Example Problem :
Use the following variables as an example problem to test your knowledge.
GSM = 100
Output Unit = oz/yd²
Result ≈ 100 / 33.9057 ≈ 2.95 oz/yd²
GSM to Oz Conversion Table
The table below shows approximate conversions from common GSM values to ounces per square yard using the formula oz/yd² ≈ GSM ÷ 33.9057.
| Fabric Weight (GSM) | Approx. oz/yd² | Illustrative use (varies by fabric) |
|---|---|---|
| 80 GSM | 2.36 oz/yd² | Very light lining or sheer fabric |
| 100 GSM | 2.95 oz/yd² | Light shirt or blouse material |
| 120 GSM | 3.54 oz/yd² | Standard casual T-shirt weight |
| 180 GSM | 5.31 oz/yd² | Mid-weight knit or jersey |
| 220 GSM | 6.49 oz/yd² | Heavy T-shirt or light sweatshirt |
| 260 GSM | 7.67 oz/yd² | Fleece or heavier knit fabric |
| 300 GSM | 8.85 oz/yd² | Heavy sweatshirt or outerwear |
Depending on the supplier, brand, or specification sheet, the same textile may be described in GSM or in ounces per unit area. Knowing the conversion factors makes it easy to compare fabrics across metric and imperial references.
