Fabric Weight Converter
Fabric shops quote cloth weight in GSM, while patterns and suppliers often use ounces per square yard. Type a value once and this converter shows it in both units instantly — so you can compare fabrics and follow any pattern with confidence.
Result will appear here.
How to use
- Type the fabric weight value in the input box.
- Choose the From unit (GSM or ounces per square yard) — the result updates live.
- Check the converted values in all units shown below.
- Match the GSM to your project: lighter GSM for shirts and linings, heavier for denim and canvas.
Tips
- Quilting cotton is usually around 120–150 GSM; denim starts near 200 GSM and climbs from there.
- A few GSM either way will not matter for most projects — fabric feel matters more than the exact number.
- When a pattern gives only one unit, convert it before buying so you get the right weight.
Note: 1 oz per square yard = 33.9057 GSM.
Frequently Asked Questions (FAQ)
What does this converter do?
It converts fabric weight between GSM and ounces per square yard.
How do I convert?
Enter the value, pick the From and To units, and the result appears instantly. The swap button flips the units.
What is the conversion factor?
1 ounce per square yard equals 33.9057 GSM.
What GSM should I pick for my project?
Use lighter GSM for shirts and linings and heavier GSM for tougher fabrics. Quilting cotton is usually around 120 to 150 GSM, while denim starts near 200 GSM.