GSM to oz/yd² converter
To convert fabric weight from GSM to ounces per square yard, divide by 33.9057; to go the other way, multiply. 145 GSM is 4.28 oz/yd².
- Weight per running metre
- 214 g
- Metres per kilogram
- 4.68 m
- Width in cm
- 147.3 cm
The formulas
- oz/yd² = GSM ÷ 33.9057
- GSM = oz/yd² × 33.9057
- Grams per running metre = GSM × width in metres
- Metres per kilogram = 1,000 ÷ grams per running metre
The factor is exact, not a rounding: an ounce is 28.349523125 g and a yard is 0.9144 m, so one ounce per square yard is 28.349523125 ÷ 0.83612736 = 33.9057 g/m².
Worked example
A 145 GSM cotton 58 inches wide: 58 in × 2.54 = 147.32 cm, so one running metre weighs 145 × 1.4732 = 213.6 g, and a kilogram holds 4.68 m. In ounces the fabric is 4.28 oz/yd².
Frequently asked questions
How do I convert GSM to oz per square yard?
Divide the GSM by 33.9057. For example, 145 GSM ÷ 33.9057 = 4.28 oz/yd².
How do I convert oz per square yard to GSM?
Multiply the ounces per square yard by 33.9057. For example, 5 oz/yd² × 33.9057 = 169.5 GSM.
How heavy is one running metre of fabric?
Multiply the GSM by the width in metres. A 145 GSM fabric 58 inches (147.3 cm) wide weighs 214 g per running metre.
How many metres of fabric are in a kilogram?
Divide 1,000 by the grams per running metre. At 214 g per metre that is 4.68 metres per kilogram.
Every fabric in the Bang Textiles catalogue lists its width; ask us for the GSM of any design.