Convert between U.S. basis weight and GSM using the standard basis size for your selected paper type.

01 / Your paper

Convert from

Paper type

Each paper type uses its own standard basis-sheet size.

Basis weight

Weight in pounds per ream of 500 basis sheets.

02 / Converted weight

— GSM

Grams per square meter · rounded to one decimal

Weight per basis sheet

— g

M weight · 1,000 basis sheets

— lb

Standard basis sheet —

Metric dimensions —

Basis-sheet area —

Understanding the numbers

Basis weight is the weight of 500 sheets at the standard size for the selected paper type. GSM lets you compare paper weights across different types.

M weight and per-sheet weight shown here use that same basis-sheet size. Actual cut-sheet weights vary with sheet dimensions.