GSM and oz/yd²

How to convert and verify denim fabric weight between grams per square meter (GSM) and ounces per square yard (oz/yd²), with standard mill moisture tolerances.

Technical Reference: GSM and oz/yd²

Subject Overview: Denim weight is commonly communicated in grams per square metre and ounces per square yard. Keeping both values available reduces conversion friction when buyers and production teams use different conventions.

Author & Reviewer
Gaurav Jain, Founder & Denim Sourcing Director at AzAttire
Industry Context
Commercial Denim Manufacturing, Quality Testing & Global Sourcing
Governing Test Standards
ASTM, AATCC, and ISO international textile evaluation standards
Associated Entity
Grams per Square Metre & Ounces (https://en.wikipedia.org/wiki/Units_of_textile_measurement)
Practical Mill Sourcing Impact
Ensures dimensional stability, shade continuity, batch-to-batch repeatability, and garment wash house performance.