Paper Conversion
Outside of North America most of the world uses metric basis weights for paper expressed as grams per square meter - gsm or gm2. One advantage of metric measurement is that the basis weight of paper is an absolute value and is not affected by the type of paper. The charts below show the equivalent metric basis weights for each type of paper.
Basis
Weight
Pounds |
Grams Per
Square Meter
(GSM) |
Basis
Weight
Pounds |
Grams Per
Square Meter (GSM) |
Basis
Weight
Pounds |
Grams Per
Square Meter
(GSM) |
WRITING
BASIS SIZE 17X22 (FACTOR =3.760) |
BOOK,
OFFSET
BASIS SIZE 25X38
(FACTOR =1.480) |
PRINTING,
BRISTOL
BASIS SIZE 22.5X28.5
(FACTOR = 2.193) |
13 |
49 |
45 |
67 |
67 |
147 |
15 |
56 |
50 |
74 |
80 |
175 |
16 |
60 |
60 |
89 |
90 |
197 |
17 |
64 |
70 |
104 |
100 |
219 |
20 |
75 |
80 |
118 |
120 |
263 |
24 |
90 |
100 |
148 |
140 |
307 |
28 |
105 |
120 |
178 |
160 |
351 |
32 |
120 |
|
80 |
395 |
36 |
135 |
200 |
438 |
|
|
NEWS,
TAG
BASIS SIZE24X36
(FACTOR = 1.627) |
COVER
BASIS SIZE 20X26
(FACTOR = 2.704) |
INDEX,
BRISTOL
BASIS SIZE 25.5X30.5
(FACTOR = 1.808) |
100 |
163 |
50 |
135 |
90 |
163 |
125 |
204 |
60 |
162 |
110 |
199 |
150 |
244 |
65 |
176 |
140 |
253 |
175 |
285 |
80 |
216 |
|
200 |
326 |
90 |
243 |
|
100 |
270 |
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