Ultimate Fabric Calculator
Convert Weight • Calculate Roll Yield • Estimate Costs
Have a roll of fabric by weight? Find out how long it is.
Buying by the Kilogram? Calculate cost per length.
Tools to Also Try
Yarn Ply to Weight Converter WPI
Textile Math: The Ultimate Fabric Weight & Yield Guide
Working with fabric across different markets means constantly switching between measurement systems and a single miscalculation can mean ordering the wrong material entirely.
For designers sourcing knits from overseas or manufacturers planning a full denim production run, having a firm grip on how GSM, ounces and linear weight relate to each other is not optional it's foundational.
The Fabric Master Calculator goes well beyond basic unit switching. It handles the professional-level math that sourcing teams, production managers and independent designers actually need: roll yield, cost-per-yard breakdowns and width adjusted linear weight all in one place.
What is GSM and Why Does it Matter?
GSM — Grams per Square Meter is the global standard for expressing how dense or heavy a fabric is. It gives you an immediate read on what a fabric is suited for before you ever touch a swatch:
70–150 GSM: Lightweight materials — think chiffon, organza or a thin jersey tee.
150–250 GSM: Mid-range fabrics covering everyday t-shirts, leggings and linen.
250+ GSM: Heavier constructions like fleece hoodies, canvas, denim and upholstery.
The Imperial Connection: Ounces per Square Yard (oz/yd²)
The U.S. market along with a handful of others measures fabric weight in ounces per square yard rather than grams per square meter. Bridging these two systems requires a consistent conversion factor:
1 GSM = 0.0294935 oz/yd²
This calculator applies that exact multiplier without rounding shortcuts. So when a supplier lists a fabric at 10.5 oz denim, you'll immediately know that translates to 356 GSM — precise enough to confirm you're sourcing the right weight every time.
The Missing Link: Linear Yard vs. Square Yard
This is where a lot of sourcing errors actually happen. These two measurements are not interchangeable:
Square Yard weight measures a fixed 36" × 36" area.
Linear Yard weight measures one full yard of fabric across its entire width.
A roll that is 60" wide contains considerably more fabric per yard than a 45" wide roll — even if both share the same GSM. Enter your fabric width and the calculator adjusts automatically, giving you a linear weight that reflects reality. This matters especially when estimating shipping costs or managing warehouse inventory.
Advanced Features for Manufacturers
Fabric Roll Length (Yield) Calculator
Got a partial roll sitting in your stockroom? With just the roll's total weight in kilograms and its GSM, this module tells you exactly how many meters and yards remain.
It removes the guesswork from inventory checks and helps production teams catch shortfalls before they become a problem on the cutting floor.
Fabric Cost Converter — Price per KG to Price per Yard
Wholesale suppliers quote by the kilogram. Garment production runs on yards. That gap can quietly distort your cost of goods calculations if you don't bridge it properly.
Enter your per-kg purchase price and the tool outputs the true cost per yard, adjusted for the fabric's weight and width the number you actually need to calculate accurate COGS.
Frequently Asked Questions
How do I figure out how much fabric is left on a roll?
You need three inputs to calculate roll weight from scratch: length, width, and GSM. If you already know the roll's weight and GSM, the calculator works in reverse — it outputs the remaining yardage for you.
If GSM doesn't change with width, why does fabric width matter?
GSM stays constant because it measures a fixed area. But when you're buying fabric by the yard, wider fabric means more total material per yard — so the linear weight climbs even though the GSM is unchanged. Width is what connects the two.
Does this work the same for knits and wovens?
Yes. The underlying math the relationship between grams, square meters, ounces, and yards — applies equally to all fabric constructions. Whether you're working with a stretch jersey or a rigid canvas, the formulas hold.
