How To Use This Paper Weight Chart: The gray highlighted areas are the standard basis weights for the paper types listed in the first column on the left. The equivalent weights within the various paper types are listed across left to right. The paper sheet sizes by which paper weight is determined is listed under the specific paper type across the top.
To find the equivalent weight of 20 lb. Bond to other paper types, locate 20 lb. in the Bond paper section, and read across the other columns.
For example, the equivalent of 20 lb. Bond to Book is 51 lb., Index is 42 lb., Cover is 28 lb. and Bristol is 34 lb.
Basis Weight: Basis weight is the standard measurement of an amount of paper. For example, the basis weight of Bond is determined by the weight of 500 sheets of 17"x22" paper (the parent size). If a ream of 17"x22" paper weighs 20 pounds, this is called 20 lb. paper.