Fabric GSM Calculator

Free Fabric GSM Calculator Online by Rectexya

Use this fabric GSM calculator page to measure GSM from a swatch, calculate GSM with a circular GSM cutter, estimate roll weight from GSM or roll weight, convert GSM to ounces per yard squared, and estimate GSM from woven construction. Perfect for textile engineers, buyers, merchandisers, and students who need quick and accurate fabric calculations.

Tip: Add this page to your bookmarks. It works as a free online textile calculator hub for daily use.

Swatch GSM calculator and GSM cutter mode

Calculate fabric GSM from a rectangular swatch or from a circular GSM cutter sample. Supports centimeters, inches, meters, and weight in grams, kilograms, pounds, or ounces.

Sample type:

Sample weight

Weight unit Grams (g) Kilograms (kg) Pounds (lb) Ounces (oz)

Sample length

Sample width

Dimension unit Centimeters (cm) Meters (m) Inches (in)

 

Fast method: if you cut a 10 cm by 10 cm swatch and weigh it in grams, GSM is weight multiplied by 100. This rectangle mode does the same for any sample size and unit.

Circular sample weight

Weight unit Grams (g) Kilograms (kg) Pounds (lb) Ounces (oz)

Circle diameter

Diameter unit Centimeters (cm) Inches (in)

 

Most GSM cutters produce a circular sample with a fixed area. This calculator handles any diameter and unit by using the exact area formula, not only a constant factor.

GSM

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Ounces per yard squared

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Sample area

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For best accuracy, cut several samples, weigh each one, and use the average weight. Repeat the measurement after finishing processes if you want production GSM instead of greige GSM.

Roll weight and GSM calculator

Start from fabric GSM or from roll weight. The calculator gives total roll weight, GSM, weight per running meter, and length per kilogram.

Roll mode:

Fabric GSM (g per m²)

Roll length (meters)

Roll width unit Inches Centimeters Meters

Roll width

Formula: roll weight (kg) = GSM × roll length (m) × roll width (m) divided by 1000.

Roll weight

Weight unit Kilograms (kg) Grams (g) Pounds (lb)

Roll length (meters)

Roll width unit Inches Centimeters Meters

Roll width

Formula for GSM from roll weight: GSM = roll weight in grams divided by (roll length (m) × roll width (m)).

GSM

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Total roll weight

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Weight per meter

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Length per kilogram

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You can confirm roll weights during receiving, planning, or before cutting. For critical contracts, always double check with actual weighings and lab reports.

GSM from woven construction (EPI and PPI)

Estimate GSM from yarn counts and density when you know the construction but do not have finished fabric weight.

Warp count (Ne)

Weft count (Ne)

Ends per inch (EPI)

Picks per inch (PPI)

Finished width (meters, optional)

 

Formula used: GSM = (EPI divided by warp count + PPI divided by weft count) × 25.537. This factor is widely used in woven fabric calculations.

Estimated GSM

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Approx oz per yard squared

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Linear meter weight

Width needed

This is a theoretical value. Finishing can increase or decrease GSM depending on processes like singeing, mercerising, sanforising, brushing, coating, or raising.

GSM and ounces per yard squared converter

Convert between GSM and oz per yard squared. Useful when you work with suppliers or buyers that use different units for fabric weight.

GSM

Ounces per yard squared

GSM

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Oz per yard squared

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Rough guide for apparel fabrics:
Light T shirt jersey: around 120 to 160 GSM
Casual knits and shirts: around 160 to 220 GSM
Hoodies, sweat shirting, heavy twills: around 260 to 360 GSM or higher

More Rectexya textile calculators and tools

Explore all fabric and garment calculation tools on Rectexya. These internal links help visitors move between GSM, yield, consumption, and yarn calculations and improve page SEO.

Fabric GSM and roll calculator Fabric yield per roll Shrinkage and relaxed GSM calculator Garment weight and fabric requirement Fabric consumption calculator Yarn count and tex conversion tools

Update the links above to match your actual tool pages. When you publish a new calculator, add it here so this page becomes a complete textile tools index for Rectexya.

What is fabric GSM and why does it matter

GSM means grams per square meter. It describes how heavy a fabric is for a fixed area and is one of the simplest ways to compare fabrics across mills and seasons. Higher GSM usually means heavier and often denser fabric. Lower GSM usually means lighter fabric that may be cooler or more flexible.

Textile professionals use GSM to:

• Check if bulk fabric matches the buyer specification.
• Estimate fabric consumption and garment weight in costing sheets.
• Compare fabric options for the same style or season.
• Control quality from lab sample to bulk production and repeat orders.

How to measure fabric GSM without a GSM cutter

If you do not have a circular GSM cutter, you can still measure GSM with scissors and a small scale:

• Cut a clean fabric rectangle such as 10 cm by 10 cm or 20 cm by 20 cm.
• Avoid distorted and heavily creased areas of the roll.
• Weigh the swatch on a digital scale.
• Enter the sample length, width, and weight in the rectangle GSM calculator on this page.

For better data, cut several swatches from different parts of the roll and work with the average GSM.

How to use a GSM cutter with this calculator

A GSM cutter gives you a circular swatch of known diameter. Instead of using a fixed multiplier, this page calculates the exact area of the circle and then the GSM. That means you can use any cutter diameter and you still get accurate results in GSM and in ounces per yard squared.

Fabric GSM calculator FAQ

Is this fabric GSM calculator accurate enough for production use

The calculator uses standard formulas from textile engineering. Accuracy depends on cutting and weighing. For commercial disputes or contracts, always support the results with laboratory tests and internal quality procedures.

Can I use this free GSM calculator for knits, wovens, and nonwovens

Yes. The formulas do not depend on fabric structure. As long as the dimensions and weights you enter are correct, the calculator works for knits, wovens, nonwovens, and technical textiles.

Why convert between GSM and ounces per yard squared

Some buyers and mills work in GSM, others work in oz per yard squared. This page includes a GSM to oz converter so both sides can express fabric weight in their preferred unit without confusion.