Fabric GSM Converter
Convert fabric weight between GSM, oz/yd², and other textile units. Free online fabric GSM converter for fashion designers, garment manufacturers, and textile buyers.
Understanding Fabric GSM
GSM (Grams per Square Meter) measures fabric weight and density. Higher GSM indicates heavier, thicker fabric. This measurement is essential for textile quality control, garment specification, and fabric sourcing across international markets.
GSM Conversion Formulas
1 GSM = 0.02949 oz/yd²
1 oz/yd² = 33.906 GSM
GSM = Weight (grams) / Area (m²)
oz/yd² = Weight (oz) / Area (yd²)
GSM is the international standard for fabric weight. Oz/yd² (ounces per square yard) is common in the US and UK. Both measure the same property using different units.
Fabric Weight Categories
| Category | GSM Range | oz/yd² Range | Common Uses |
|---|---|---|---|
| Ultra Light | 30-100 GSM | 1-3 oz/yd² | Lining, chiffon, voile |
| Light | 100-150 GSM | 3-4.5 oz/yd² | Shirts, blouses, summer wear |
| Medium | 150-250 GSM | 4.5-7.5 oz/yd² | T-shirts, dresses, light pants |
| Heavy | 250-350 GSM | 7.5-10 oz/yd² | Hoodies, sweatshirts, jackets |
| Extra Heavy | 350+ GSM | 10+ oz/yd² | Coats, denim, upholstery |
Textile Standards by Fabric Type
T-Shirt Fabrics
Lightweight: 130-150 GSM (4-4.5 oz/yd²)
Standard: 150-180 GSM (4.5-5.5 oz/yd²)
Heavy: 180-220 GSM (5.5-6.5 oz/yd²)
Premium: 220-250 GSM (6.5-7.5 oz/yd²)
Hoodie and Sweatshirt Fabrics
Lightweight: 250-280 GSM (7.5-8.5 oz/yd²)
Standard: 280-320 GSM (8.5-9.5 oz/yd²)
Heavy: 320-380 GSM (9.5-11 oz/yd²)
Premium: 380-450 GSM (11-13 oz/yd²)
Denim Fabrics
Lightweight: 200-250 GSM (6-7.5 oz/yd²)
Standard: 250-350 GSM (7.5-10 oz/yd²)
Heavy: 350-450 GSM (10-13 oz/yd²)
Selvedge: 400-500+ GSM (12-15 oz/yd²)
Bed Sheet Fabrics
Percale: 100-130 GSM (3-4 oz/yd²)
Sateen: 130-180 GSM (4-5.5 oz/yd²)
Flannel: 150-200 GSM (4.5-6 oz/yd²)
Higher GSM = warmer, more durable
GSM Calculation Examples
Example 1: GSM to oz/yd²
Fabric: 200 GSM
Conversion: 200 × 0.02949 = 5.9 oz/yd²
Use: Standard t-shirt weight
Suitable for: Year-round wear
Example 2: oz/yd² to GSM
Fabric: 8 oz/yd²
Conversion: 8 × 33.906 = 271 GSM
Use: Light hoodie weight
Suitable for: Spring/fall sweatshirts
Example 3: Calculate GSM from Sample
Sample: 10 cm × 10 cm = 0.01 m²
Weight: 2.5 grams
GSM: 2.5 / 0.01 = 250 GSM
Use: Heavy t-shirt or light hoodie
Example 4: Fabric Order Calculation
Order: 1000 t-shirts at 180 GSM
Fabric per shirt: 1.5 m²
Total fabric: 1,500 m²
Total weight: 1,500 × 180 = 270 kg
GSM Measurement Methods
Cut and Weigh Method
Cut 100 cm² sample
Weigh on precision scale
Multiply by 100 for GSM
Most accurate method
GSM Cutter
Use circular cutter (100 cm²)
Weigh sample directly
Reading = GSM
Industry standard tool
Fabric Balance
Specialized scale for GSM
Direct reading in GSM
Quick and convenient
Requires calibration
Online Conversion
Enter known weight and area
Automatic calculation
Convert between units
Useful for quick estimates
Frequently Asked Questions
What is a good GSM for t-shirts?
Standard t-shirts use 150-180 GSM. Lightweight summer shirts use 130-150 GSM. Heavy premium shirts use 180-220 GSM. Higher GSM means thicker, more durable fabric but less breathability.
Is higher GSM always better?
Higher GSM means heavier fabric, not necessarily better quality. Choose GSM based on garment purpose. Summer wear needs lower GSM. Winter wear benefits from higher GSM. Consider drape and comfort.
How do I convert GSM to oz/yd²?
Multiply GSM by 0.02949. For quick estimation, divide GSM by 34. Example: 200 GSM × 0.02949 = 5.9 oz/yd². Or 200 / 34 = 5.88 oz/yd².
What GSM is suitable for hoodies?
Light hoodies: 250-280 GSM. Standard hoodies: 280-320 GSM. Heavy hoodies: 320-380 GSM. Premium winter hoodies: 380-450 GSM. French terry typically uses 280-350 GSM.
Other Free Tools
Thread Count Converter
Convert and compare thread count values across different measurement standards for bed sheets and fabrics. Free online thread count converter for textile buyers and bedding shoppers.
Clothing Size Converter
Convert clothing sizes between US, UK, EU, and Asian standards for men, women, and kids. Free online clothes size converter for international shopping and fashion retail.
Weight and Mass Converter
Convert weight and mass units — kilograms, pounds, grams, ounces, tons, and more. Accurate online weight converter for cooking, shipping, and science.
Area Converter
Convert area units — square meters, acres, hectares, square feet, square kilometers, and more. Ideal for real estate and construction.
Length Converter
Convert length units instantly — meters, feet, inches, kilometers, miles, yards, and more. Free online length converter for everyday and scientific use.
Volume Converter
Convert volume units — liters, gallons, milliliters, cubic feet, fluid ounces, and more. Free online volume converter for cooking and engineering.
Density Converter
Convert density units — kg/m³, g/cm³, lb/ft³, lb/in³, and more. Free online density converter for material science, chemistry, and engineering.
Dynamic Viscosity Converter
Convert dynamic viscosity units — Pa·s, centipoise, poise, lb/(ft·s), and more. Free online converter for fluid mechanics and chemical engineering.
Kinematic Viscosity Converter
Convert kinematic viscosity units — m²/s, centistokes, stokes, ft²/s, and more. Accurate online converter for fluid dynamics and oil analysis.
Surface Tension Converter
Convert surface tension units — N/m, mN/m, dyne/cm, lbf/ft, and more. Free online converter for chemistry and materials science.
Mass Flux Density Converter
Convert mass flux density units — kg/(m²·s), lb/(ft²·s), and more. Free online mass flux converter for chemical engineering and filtration.
Heat Flux Density Converter
Convert heat flux density units — W/m², BTU/(h·ft²), cal/(s·cm²), and more. Free online converter for thermal engineering and solar energy.
Heat Transfer Coefficient Converter
Convert heat transfer coefficient units — W/(m²·K), BTU/(h·ft²·°F), and more. Accurate online converter for convection and HVAC engineering.
Linear Current Density Converter
Convert linear current density units — A/m, mA/cm, kA/m, and more. Free online converter for electromagnetics and electrical engineering.
Surface Current Density Converter
Convert surface current density units — A/m², mA/cm², kA/m², and more. Accurate online converter for electromagnetic field analysis and power systems.
Electric Field Strength Converter
Convert electric field strength units — V/m, kV/m, N/C, and more. Free online electric field converter for electrostatics and antenna design.
Specific Volume Converter
Convert specific volume units — m³/kg, L/kg, ft³/lb, and more. Accurate online converter for thermodynamics and fluid mechanics.
Specific Heat Capacity Converter
Convert specific heat capacity units — J/(kg·K), BTU/(lb·°F), cal/(g·°C), and more. Accurate online converter for thermodynamics and chemistry.
Thermal Conductivity Converter
Convert thermal conductivity units — W/(m·K), BTU/(h·ft·°F), cal/(s·cm·°C), and more. Free online converter for insulation and heat transfer engineering.
Thermal Resistance Converter
Convert thermal resistance units — K/W, °C/W, °F·h/BTU, and more. Accurate online converter for HVAC, insulation, and electronics cooling.
Acceleration Converter
Convert acceleration units — m/s², g-force, ft/s², Gal, and more. Accurate online converter for physics, aerospace, and mechanical engineering.
Speed Converter
Convert speed units — km/h, mph, m/s, knots, and more. Free online speed converter for travel, sports, physics, and engineering.
Time Converter
Convert time units — seconds, minutes, hours, days, weeks, months, years. Simple online time converter for everyday and scientific use.
Lumber Board Feet Calculator
Calculate board feet of lumber instantly. Enter thickness, width, and length to get total board footage for any wood project. Free online lumber board feet converter for construction and carpentry.
Floor Area Converter
Convert floor area between square meters, square feet, square yards, and more. Free online floor area converter for real estate, interior design, and construction planning.
Roofing Sheet Coverage Calculator
Calculate how many roofing sheets you need for your roof area. Enter roof dimensions, sheet size, and overlap to get an accurate sheet count. Free online roofing coverage calculator.
Ingredient Density Converter
Convert between volume and weight for common cooking ingredients using accurate density values. Free online ingredient converter for baking, cooking, and precise recipe scaling.
Cups to Grams Converter
Convert cups to grams for flour, sugar, butter, rice, oats, and 50+ ingredients. Get accurate weight measurements for any recipe with our free online cups to grams converter.
Cups to ml Converter
Convert cups to milliliters, tablespoons, fluid ounces, and liters instantly. Free online cups to ml converter for accurate liquid measurements in any recipe or cooking project.
Thermal Expansion Converter
Convert thermal expansion coefficients — per Kelvin, per Celsius, per Fahrenheit, and more. Free online converter for materials science and engineering.