Input Measurements
Live Auto-Calculation
Output Summary
Verified Spec
Calculating...
Initial output value
Metric GSM (g/m²)
200.0 g/m²
Imperial Ounces (oz/yd²)
5.90 oz/yd²
Linear Weight (54" Roll)
274.3 g / linear meter
Linear Weight (60" Roll)
304.8 g / linear meter
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How to Use the Fabric Weight Converter (GSM ⇄ oz/yd²)
- Select your desired options and garment / fabric specifications from the input fields above.
- Enter your measurements with high precision using the labeled unit selectors (inches, centimeters, or grams).
- Review the live calculation summary in the prominent result card to confirm fabric yardage, cuts, or conversions.
- Use the "Copy Specification" button to save your cutting specification to your tech pack or pattern notes.
Documented Textile Industry Formula
Fabric Weight Conversion Constant
- 1. Conversion Factor: 1 oz/yd² = 33.906 g/m² (GSM)
- 2. GSM to oz/yd² = GSM / 33.906 (or multiply by 0.0294935)
- 3. oz/yd² to GSM = oz/yd² × 33.906
- 4. Linear weight (g/m) = GSM × Fabric Width in meters
Worked Calculation Example
Real-World Scenario: Converting a 12 oz/yd² raw selvedge denim fabric to metric GSM.
- • Formula: GSM = 12 oz/yd² × 33.906
- • GSM = 406.87 g/m²
A 12 oz denim corresponds to 406.9 GSM (heavyweight woven denim).
Frequently Asked Questions
What is the exact conversion formula between GSM and oz/yd²?
To convert GSM to oz/yd², divide the GSM by 33.906. To convert oz/yd² to GSM, multiply the ounces by 33.906.
Why does the US use oz/yd² while the rest of the world uses GSM?
The United States textile industry traditionally measures fabric weight based on ounces per square yard (imperial system), while Europe, Asia, and international mills use the metric GSM (grams per square meter).
What is considered lightweight vs heavyweight fabric in oz/yd²?
Under 4 oz/yd² is lightweight (linen, voile, chiffon). 4 to 8 oz/yd² is medium-weight (t-shirts, shirting, dresses). Over 8 to 16 oz/yd² is heavyweight (fleece hoodies, denim, workwear).