GSM ↔ oz/yd² Converter

Bridge metric (g/m²) and US/UK (oz/yd²) fabric weight. Free, no sign-up; the formula used is shown openly on the page.

Formula

g/m² = oz/yd² × 33.906 · oz/yd² = g/m² ÷ 33.906. The 33.906 constant comes from one ounce (28.35 g) over one square yard (0.836 m²).

5 oz/yd² → 5 × 33.906 = 169.5 g/m². Conversely 200 g/m² → 200 ÷ 33.906 = 5.90 oz/yd².

200 g/m² = 200 ÷ 33.906 = 5.90 oz/yd².

GSM (g/m²) is the weight in grams of one square metre of fabric — the standard measure of fabric weight/density.

oz/yd² is the weight in ounces of one square yard of fabric — the unit commonly used by US and UK buyers.