Fabric Weight Converter

Fabric weight is one of the most useful numbers in textile work, because it predicts how a material will drape, insulate, and hold up to use, largely independent of its fiber content or weave structure. This calculator converts between the three units the industry actually uses: GSM (grams per square meter), the international standard printed on most fabric spec sheets; oz/yd² (ounces per square yard), the customary US unit; and oz/linear yard, which folds in Fabric Width because a bolt of fabric is sold and cut by the linear yard rather than the square yard. Enter a Weight Value in any one of the three units via Input Unit, and the calculator solves for the other two directly using the standard GSM-to-oz/yd² conversion factor of 0.029494 -- raising the entered Weight Value always raises every other weight figure in step, since all four outputs are fixed multiples of the same physical quantity.

Fabric Width only matters for the oz/linear-yard conversion: because a linear yard packs the fabric's full width into a strip of fixed length, a wider bolt at the identical GSM yields more ounces per linear yard, while GSM, kg/m², and oz/yd² -- all defined per unit area -- never depend on width at all. That distinction trips up a lot of buyers comparing supplier spec sheets: two fabrics quoted at the same oz/yd² are equally heavy per square yard, but a narrower one will weigh less per linear yard off the bolt, which is what actually determines shipping weight and per-yard cost.