Fabric Weight (GSM)
Compute a fabric's weight in grams per square meter (GSM) by dividing a sample's mass by its area. It is the main measure of fabric 'weight': light T-shirt knits are 140–180 g/m², sweatshirts 280–340, canvas and denim much more. GSM defines hand, drape, durability and price, and is specified in almost every textile spec sheet. Enter the sample's mass and area.
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Fabric weight (GSM)
Fabric weight, or GSM (grams per square meter), is the single number that describes a fabric fastest: its weight per unit area. A lightweight T-shirt jersey sits at 140–180 g/m²; a polo piqué knit, 200–250; a fleece sweatshirt, 280–340; twills and canvas, a good deal more. Fabric weight ties directly into hand feel, drape, opacity, warmth and durability — and into cost, since fabric is bought by weight. It is measured by cutting a swatch of known area (often with a circular cutter of 100 cm²) and weighing it on a precision balance. It shows up on practically every textile spec sheet. Enter the mass and the area of the swatch.
Related Tools
Fabric Shrinkage
Compute a fabric's shrinkage after washing, S = (initial measure − final measure)/initial measure · 100%, the percentage reduction in length or width. Almost every fabric shrinks in the first wash (cotton can exceed 5%), so the pattern must compensate for that percentage and the fabric is usually pre-shrunk (sanforized). Ignoring it makes the garment come out smaller than the nominal size. Enter the measures before and after washing.
Fabric Cover Factor
Compute a fabric's cover factor, CF = thread density (threads/cm) · √(Tex), an index of how 'closed' the weave is — how much the threads cover the area, leaving more or fewer open spaces. High factors indicate dense, opaque fabrics (canvas, twill); low ones, sheer, breathable fabrics (voile, mesh). It influences air permeability, opacity and strength. Enter the thread density and the count in Tex.
Fabric Thread Count
Compute a woven fabric's thread density by adding the warp threads (lengthwise) and weft threads (widthwise) per centimeter. It is an indicator of construction and quality: higher density usually means a firmer, more durable and fuller fabric. It appears on spec sheets as 'threads/cm' or 'thread count'. Enter the warp and weft threads per cm.
Fabric Dye Calculator: Percent of Fabric Weight
Multiplies the dry weight of the cloth in grams by the depth of shade you want, to get grams of dye: 300 g of fabric at 3 percent needs 9 g.
Blast Hole Count
Calculate the number of holes of a blast pattern, N = area ÷ (burden × spacing), dividing the bench area to blast by the pattern area of each hole (burden B × spacing S). The result is the number of holes needed to cover the area with the specified drilling pattern. In practice, round up. It is an essential quantity calculation in blast planning: it sets the drilling time, the amount of explosive and accessories, and the operation cost. Wider patterns (larger B and S) reduce the number of holes but may worsen fragmentation. Enter the area, the burden and the spacing.
Volumetric Weight Calculator
Compute volumetric weight: (L × W × H cm) / factor (5000 air, 6000 ground). Compare to actual weight.
The results provided by this tool are for general informational and educational purposes only and do not constitute professional, financial, medical, legal, tax or accounting advice. Always confirm important decisions with a qualified professional and official sources.