Xerox 288 Digital Perfecting System Paper, Paper Manual

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X e r o x N u v e r a P a p e r G u i d e A - 2
C o n v e r t i n g p a p e r w e i g h t f r o m p o u n d s t o g s m
NOTE: Tag appears in the table twice because two basic sizes are
commonly used.
Formula for converting paper weights
If you know the paper grade, you can use the following formula
and the values in
Table A-2. to convert the weight from pounds to
gsm.
Formula
(weight in pounds) x (multiplier from table) = (weight in gsm)
Examples
The weight of 90 pound offset paper is approximately 133 gsm.
90 x 1.4802 = 133.218
The weight of 100 pound cover is approximately 270 gsm. 100 x
2.7042 = 270.42
Table for converting paper weights
You can also use Table A-3. to convert pounds to gsm weight.
1. Locate the paper type at the top of the table.
2. Move down the paper type column and locate the basis
weight.
3. Follow the basis weight row to the left to find the approximate
gsm weight.
Cover 20 x 26
Index 25.5 x 30.5
Tag 24 x 36
Bristol / Tag 22.5 x 28.5
Table A-1. Basic sizes
Paper Grades Basic Size (inches)
Table A-2. Multipliers for converting pounds to gsm
Stock type Multiplier
Bond / Xerographic / Ledger / Writing 3.76
Offset / Book / Text 1.48
Cover 2.70
Index 1.81
Tag (24 x 36) 1.63
Bristol and Tag (22.5 x 28.5) 2.19