Instant conversion between GSM (g/m²) and oz/yd². A free B2B helper for fabric sourcing, merchandising and pre-print teams.
Typical fabrics
Converted weight
Roll / cut weight estimate
PO cost planning after GSM lock-in
Align oz/yd² quotes to g/m²
US suppliers quote oz/yd²; EU/TR teams cost in g/m². Paste the conversion from this tool into the GSM field on the Fabric Cost Calculator — per-kg pricing drifts when weight is wrong.
Carry roll weight into landed cost
Combine the kilograms estimated from length × width with your price per meter/m². Lock waste % and piece count in the cost tool — copy summary into purchasing notes.
Validate pattern cost before PO sign-off
After landed fabric cost is clear, build the same repeat in AI Pattern Studio. Spot color count and waste % directly affect the m² cost in the calculator.
Convert oz/yd² quotes to g/m² in this tool and paste into the GSM field on the Fabric Cost Calculator. Per-kg pricing drifts when weight is wrong — add roll-weight estimates to the same PO line.
Size repeats against fabric weight
Heavy GSM swallows fine lines; lighter fabrics print smaller motifs more cleanly. Set repeat dimensions in the Generator after GSM lock-in — spot color count directly affects m² cost.
Build seamless art after cost is clear
Once landed fabric cost and waste % are locked, create seamless repeats in AI Pattern Studio with the same palette. Sample approval should precede PO signature — follow palette limits in the guide.
Convert oz/yd² quotes to g/m² in this tool and paste into the GSM field on the Fabric Cost Calculator. Roll-weight estimates and landed cost should sit on the same PO line — wrong weight skews mockup scale.
Pick mesh and drape for the GSM
Heavy GSM drapes differently on scarf vs tee templates. Choose the template in Mockup Studio after weight lock-in — lighter fabrics show fine motifs more cleanly; heavier fabrics need wider repeats for natural drape.
Render photoreal mockups after cost is clear
Once landed cost and waste % are locked, upload the same repeats into Mockup Studio as PNG/JPEG. Buyer approval should precede PO signature — follow scale/rotate steps in the mockup guide.
Convert oz/yd² quotes to g/m² in this tool and paste into the GSM field on the Fabric Cost Calculator. Roll-weight estimates and landed cost should sit on the same PO line — wrong weight skews path density in HiveForge.
Match GSM to spot colors and path density
Heavier GSM (≥220 g/m²) means more ink mass and fewer fine paths for the same repeat area. Simplify spot color count against your GSM lock-in before uploading to HiveForge — lighter fabrics vectorize fine lines more cleanly.
Vectorize after cost is clear
Once landed cost and waste % are locked, convert the same patterns to RIP-safe SVG in Vectorizer Studio. Sample approval should precede PO signature — read the Vectorization guide for the SSIM ≥ 0.85 threshold.
Convert oz/yd² quotes to g/m² in this tool and paste into the GSM field on the Fabric Cost Calculator. Roll-weight estimates and landed cost should sit on the same PO line — wrong weight skews ink load in the RIP.
Match GSM to print dimensions and ink load
Heavier GSM (≥220 g/m²) means more ink mass for the same repeat area. After upscaling, validate roll weight estimates against your RIP print width × length — lighter fabrics print fine lines more cleanly; heavier fabrics need wider repeats.
Upscale to print size after cost is clear
Once landed cost and waste % are locked, run the same patterns through Upscale Studio to 300+ DPI at final print size. Sample approval should precede PO signature — read the Upscale quality guide for the SSIM ≥ 0.85 threshold.
Fabric weight (GSM / oz/yd²) drives hand-feel, drape, ink consumption and landed cost. The same cloth may be quoted in GSM in TR/EU and oz/yd² on US POs. This converter standardizes units so sample and purchase-order mismatches drop.
Professional workflows triple-check weight: sample weighing, mill spec and PO line. After shrinkage, use the Shrinkage Calculator for effective weight; the Fabric Cost Calculator for meter/kg pricing; and the Yarn Count Converter to align Ne/Nm/Tex/Denier quotes.
SapphireSC (sapphiresc.com) is the B2B AI platform from İlçel Sapphire Tekstil (Bursa): seamless pattern generation, upscale, vectorization and mockups. This free GSM converter provides real technical content for organic search and AI discovery; production workflows continue in the AI Pattern Generator and Vectorizer.
200–280 GSM — interlock, sweatshirt, mid-weight home textile
300–450 GSM — denim, fleece, heavy upholstery (≈ 8.8–13.3 oz/yd²)
For technical fabrics GSM alone is not enough — knit type, yarn count and finish must be considered
Quick reference formulas
GSM = oz/yd² × 33.9057478
oz/yd² = GSM ÷ 33.9057478
Practical approx: 1 oz/yd² ≈ 33.9 GSM
Frequently asked questions
What is GSM?
GSM (grams per square meter) is fabric mass per unit area. It is the most common fabric-weight unit on EU and Turkish purchase orders, tech packs and mill quotes.
How do I convert oz/yd² to GSM?
1 oz/yd² ≈ 33.906 g/m². Formula: GSM = oz/yd² × 33.9057478. Inverse: oz/yd² = GSM ÷ 33.9057478. This tool uses that industry factor.
What is 180 GSM in oz/yd²?
180 GSM ≈ 5.31 oz/yd². Light jersey and blouse fabrics often sit in the 140–180 GSM range; denim and heavy goods can exceed 300 GSM.
Should I use GSM or oz/yd²?
GSM (g/m²) is standard in Turkey, the EU and most Asian supply chains. US imports and some home-textile POs use oz/yd². When both units appear on one order, align them here, then compare unit pricing in the Fabric Cost Calculator.
Is GSM related to yarn count (Ne/Nm)?
Yes — for the same construction, finer yarn (higher Ne/Nm) usually yields lower GSM; knit density and finish matter too. Use the Yarn Count Converter for Ne/Nm/Tex/Denier; enter GSM in the Fabric Cost Calculator to tie weight to landed cost.
Is this GSM converter free?
Yes. The fabric GSM converter is free and runs entirely in your browser. Sapphire AI tools such as pattern generation, upscale, and vectorization require an account and credits.