Garment unit converter: cm to inches (with fractions) and GSM to oz
Factories in Asia usually work in centimetres, while many US brands write specs in inches with fractions. Convert both ways here, and convert fabric weight between GSM and ounces per square yard.
Centimetres to inches
28 3/8″ (28.35 in)
Inches to centimetres
72.07 cm
GSM to oz/yd²
5.9 oz/yd²
oz/yd² to GSM
203 GSM
Common fabric weights
| Garment | GSM | oz/yd² |
|---|---|---|
| Lightweight T-shirt | 150 | 4.42 |
| Standard T-shirt | 180 | 5.31 |
| Heavyweight T-shirt | 260 | 7.67 |
| Polo (piqué) | 220 | 6.49 |
| Sweatshirt fleece | 300 | 8.85 |
| Heavyweight hoodie | 400 | 11.8 |
Questions
- Why fractions of an inch?
- US garment specs are usually written to the nearest 1/8 inch (sometimes 1/4), because that is what a tape measure shows.
- How do I convert GSM to oz?
- Divide GSM by 33.906 to get ounces per square yard. 200 GSM is about 5.9 oz/yd².
Put these numbers into a full tech pack.
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