GSM to Paper Thickness Converter
Easily convert paper grammage (GSM) to approximate thickness (mm) and find the ideal cardstock or rigid board for your custom sample books, presentation binders, and packaging boxes.
Input Grammage (GSM)
Grams per Square MeterGSM
💡 Material Guide: Lower GSM (100–200g) is typically used for inner pages and manuals. Medium to heavy cardstock (250–400g) is ideal for folder covers and product boxes. Rigid gray boards (800–1500g) provide structural strength for presentation binders and gift boxes.
Conversion Results
Approx. Thickness (mm)0.38 mm
Approx. Thickness (pt / mils)15.0 pt
Recommended ApplicationPresentation Folders & Covers
*Note: Actual thickness may vary slightly depending on paper texture, coating, and manufacturing pulp density.