Paper Basis Weight Calculator

Convert between GSM (metric) and US basis weight (lbs/ream) for any paper grade. Estimates caliper thickness and M-weight.

Paper grade

Basis weight (lbs)

Sheets per ream

Bulk factor

Tab to move between fields

GSM (g/m²)

88.81

Basis weight (lbs)60

Ream weight (lbs)60

Caliper (mils)0.89

Caliper (mm)0.02

M-weight (lbs)120

How to Use This Calculator

Select the paper grade (Bond, Book/Text, Cover, Bristol, Index, or Tag).
Enter the US basis weight (lbs) for your paper as listed on the product spec.
Set sheets per ream (typically 500) and the bulk factor if specified.
Review GSM conversion, Caliper (mils and mm), Ream Weight, and M-weight.
Use the GSM value when ordering from international suppliers or comparing global grades.

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