Quick answer
How do I convert GLM to GSM?
GSM = GLM ÷ width in metres.
GSM = GLM ÷ Width (m)
How it works
GLM → GSM Calculator
Convert grams per linear metre back to GSM when a supplier quotes weight per running metre.
Divide the weight of one running metre by the width in metres to get weight per square metre.
Formula
The formula, in full
- GSM
- GLM ÷ Width (m)
- Metres per kg
- 1000 ÷ GLM
Example
330 g/m at 58"
- 01Width = 1.473 m
- 02GSM = 330 ÷ 1.473 = 224.0 g/m²
Use “Load Example” above to run this example in the calculator.
Industry tip
Industry tip
“If a supplier quotes GLM, always confirm whether width is with or without selvedge — the GSM changes accordingly.”
Assumptions
What this calculator assumes
- Width is the full width the GLM was measured on.
FAQ
Frequently asked questions
How do I convert GLM to GSM?
GSM = GLM ÷ width in metres.
Formula and worked example checked by the TextileSuite team on 17 October 2026. Results are planning estimates — confirm critical numbers against your own samples and lab reports.