Fabric Weight Calculator

FABRIC

Weigh a swatch of fabric and enter its size to find the fabric weight in GSM (grams per square meter) and ounces per square yard.

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Weight (GSM)
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oz per sq yard
GSM = grams divided by area in square meters. Ounces per square yard = GSM times 0.0295.

How it works

Fabric weight is mass per area. Convert the swatch dimensions to meters, multiply for the area, and divide the weight by it to get GSM. A larger swatch gives a more accurate reading than a tiny scrap.

Bigger swatch, better reading. A 20 by 20 cm swatch on an accurate gram scale gives a reliable GSM. Very small scraps magnify weighing errors.

See the Fabric Weight Chart and the Fabric Weight Formula.

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The calculators and tools on Formula Factory are provided for general guidance and informational purposes only. Results are estimates based on standard formulas and the values you enter — they do not constitute professional engineering, electrical, or architectural advice. Always verify calculations with a qualified professional before making decisions for any safety-critical, code-compliance, or commercial application. Formula Factory makes no representations or warranties as to the accuracy or completeness of any result, and accepts no liability for errors, omissions, or any outcomes arising from reliance on this information.