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Basis Weight and Grammage
Conversion Tables

Of Use in the Publishing Industry

To ensure production quality when publications designed or typeset in one country are printed in a second country, it may be necessary to convert US basis weights to their metric equivalents or vice versa. Because designers and publishers often do not have ready access to conversion tables, EDS Inc., Editorial & Design Services, has published the multidirectional tables on this page. (For grammage of Japanese papers, see Japanese Papers for Printing.)

Basis Weight
In the United States, the weight in pounds of one ream (500 sheets) of paper cut to the basic size (or trade size) for a specific grade of paper.
Grammage
In countries using the metric system, the weight in grams of one sheet of paper that is one square meter in area--not dependent on basic sheet size or paper grade.
Key to Paper Grades in Basis Weight and Grammage Equivalents Tables Grammage & Basis Weight
Equivalents Arranged by Grammage
Basis Weight & Grammage Equiva-
lents Arranged by US Paper Grade
Basis Weight & Grammage
Conversion Factors

Key to Paper Grades in Basis Weight
and Grammage Equivalents Tables
Paper
Grade
Basic Size Look
Under
Paper
Grade
Basic Size Look
Under
Bible 25" x 38" Book Manifold 17" x 22" Bond
Bond 17" x 22" Bond Newsprint 24" x 36" Newsprint
Book 25" x 38" Book Offset 25" x 38" Book
Bristol 22.5" x 28.5" Bristol Onionskin 17" x 22" Bond
Coated 25" x 38" Book Safety 17" x 22" Bond
Cover 20" x 26" Cover Tag 24" x 36" Tag
Index 25.5" x 30.5" Index Text 25" x 38" Book
Ledger 17" x 22" Bond Wedding 17" x 22" Bond

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Basis Weight and Grammage Equivalents
Arranged by US Paper Grade

Basis weights are given in bold type; Basic sizes are given in inches;
"Grammage" can be written either as shown in parentheses in the column
head or with the simplified notation "gsm" (i.e., grams per square meter).
N.B. Except for basis weights, all weights are rounded off to the nearest
whole number; Grammage is calculated from basis weight; Cross-grade
equivalents are calculated from grammage; Because of rounding,
cross-grade equivalents are sometimes inconsistent.
Paper
Grade
Bond
17 x 22
News-
print
24 x 36
Book
25 x 38
Cover
20 x 26
Bristol
22.5 x
28.5
Index
25.5 x
30.5
Tag
24 x 36
Gram-
mage
g slash m superscript 2.
Bond 8 18 20 11 14 17 18 30
9 21 23 13 15 19 21 34
12 28 30 17 21 25 28 45
13 30 33 18 22 27 30 49
16 37 41 22 27 33 37 60
20 46 51 28 34 42 46 75
24 55 61 33 41 50 55 90
28 65 71 40 48 58 65 105
32 74 81 44 55 67 74 120
36 83 91 50 62 75 83 135
40 92 102 56 69 83 92 150
News-
print
10 22 24 13 16 20 22 36
12 28 31 17 21 25 28 46
13 30 33 18 22 27 30 49
14 32 35 19 24 29 32 52
15 34 37 20 25 31 34 55
15 35 39 21 26 32 35 57
Book 7 15 17 9 11 14 15 25
8 18 20 11 13 16 18 30
9 22 24 13 16 20 22 36
12 27 30 16 20 25 27 44
13 30 33 18 22 27 30 49
14 32 35 19 24 29 32 52
16 36 40 22 27 33 36 59
17 39 43 24 29 35 39 64
18 41 45 25 30 37 41 67
20 45 50 27 34 41 45 74
22 50 55 30 37 45 50 81
24 55 60 33 40 49 55 89
28 64 70 38 47 57 64 104
30 68 75 41 51 61 68 111
31 73 80 44 54 65 73 118
35 82 90 49 61 74 82 133
39 91 100 55 67 82 91 148
41 95 105 57 71 86 95 155
43 98 108 59 73 88 98 160
47 109 120 66 81 98 109 178
Cover 29 66 73 40 49 60 66 108
36 83 91 50 62 75 83 135
40 91 100 55 68 82 91 149
43 100 110 60 74 90 100 162
45 105 115 63 78 94 105 170
47 108 119 65 80 97 108 176
47 109 120 66 81 98 109 178
49 113 124 68 85 103 113 184
50 116 128 70 86 105 116 189
58 133 146 80 99 120 133 216
60 139 153 84 104 126 139 227
65 150 164 90 111 135 150 243
72 166 183 100 123 150 166 270
79 183 201 110 136 165 183 298
86 199 219 120 148 179 199 325
94 216 237 130 160 194 216 352
Bristol 33 77 84 46 57 69 77 125
39 90 99 54 67 81 90 147
47 108 119 65 80 97 108 175
52 121 133 73 90 109 121 197
58 135 148 81 100 121 135 219
70 162 178 97 120 146 162 263
82 189 207 114 140 170 189 307
93 216 237 130 160 194 216 351
105 243 267 146 180 218 243 395
117 269 296 162 200 243 269 439
Index 43 100 110 60 74 90 100 163
53 122 134 74 91 110 122 199
67 156 171 94 115 140 156 253
82 189 208 114 140 170 189 307
106 244 269 147 181 220 244 398
Tag 43 100 110 60 74 90 100 163
54 125 137 75 93 113 125 203
65 150 165 90 111 135 150 244
76 175 192 105 130 158 175 285
87 200 220 120 148 180 200 326
108 250 275 150 186 225 250 407
130 300 330 181 227 270 300 488

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Grammage and Basis Weight Equivalents
Arranged by Grammage

Basis weights are given in bold type; Basic sizes are given in inches;
"Grammage" can be written either as shown in parentheses in the column
head or with the simplified notation "gsm" (i.e., grams per square meter).
N.B. Except for basis weights, all weights are rounded off to the nearest
whole number; Grammage is calculated from basis weight; Cross-grade
equivalents are calculated from grammage; Because of rounding,
cross-grade equivalents are sometimes inconsistent.
Gram-
mage
g slash m superscript 2.
Bond
17 x 22
News-
print
24 x 36
Book
25 x 38
Cover
20 x 26
Bristol
22.5 x 28.5
Index
25.5 x 30.5
Tag
24 x 36
25 7 15 17 9 11 14 15
30 8 18 20 11 13 16 18
34 9 21 23 13 15 19 21
36 10 22 24 13 16 20 22
44 12 27 30 16 20 25 27
45 12 28 30 17 21 25 28
46 12 28 31 17 21 25 28
49 13 30 33 18 22 27 30
52 14 32 35 19 24 29 32
55 15 34 37 20 25 31 34
57 15 35 39 21 26 32 35
59 16 36 40 22 27 33 36
60 16 37 41 22 27 33 37
64 17 39 43 24 29 35 39
67 18 41 45 25 30 37 41
74 20 45 50 27 34 41 45
75 20 46 51 28 34 42 46
81 22 50 55 30 37 45 50
89 24 55 60 33 40 49 55
90 24 55 61 33 41 50 55
104 28 64 70 38 47 57 64
105 28 65 71 40 48 58 65
108 29 66 73 40 49 60 66
111 30 68 75 41 51 61 68
118 31 73 80 44 54 65 73
120 32 74 81 44 55 67 74
125 33 77 84 46 57 69 77
133 35 82 90 49 61 74 82
135 36 83 91 50 62 75 83
147 39 90 99 54 67 81 90
148 39 91 100 55 67 82 91
149 40 91 100 55 68 82 91
150 40 92 102 56 69 83 92
155 41 95 105 57 71 86 95
160 43 98 108 59 73 88 98
162 43 100 110 60 74 90 100
163 43 100 110 60 74 90 100
170 45 105 115 63 78 94 105
175 47 108 119 65 80 97 108
176 47 108 119 65 80 97 108
178 47 109 120 66 81 98 109
184 49 113 124 68 85 103 113
189 50 116 128 70 86 105 116
197 52 121 133 73 90 109 121
199 53 122 134 74 91 110 122
203 54 125 137 75 93 113 125
216 58 133 146 80 99 120 133
219 58 135 148 81 100 121 135
227 60 139 153 84 104 126 139
243 65 150 164 90 111 135 150
244 65 150 165 90 111 135 150
253 67 156 171 94 115 140 156
263 70 162 178 97 120 146 162
270 72 166 183 100 123 150 166
285 76 175 192 105 130 158 175
298 79 183 201 110 136 165 183
307 82 189 207 114 140 170 189
325 86 199 219 120 148 179 199
326 87 200 220 120 148 180 200
351 93 216 237 130 160 194 216
352 94 216 237 130 160 194 216
395 105 243 267 146 180 218 243
398 106 244 269 147 181 220 244
407 108 250 275 150 186 225 250
439 117 269 296 162 200 243 269
488 130 300 330 181 227 270 300

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Basis Weight and Grammage Conversion Factors
"Lb." means "pounds" (i.e., basis weight); "Gsm" means "grams
per square meter" (i.e., grammage); Some of the basic sizes here
are not included in the tables above.
Basic Size
(Trade Size)
Basis Weight to
Grammage
Grammage to
Basis Weight
17" x 22" 3.7597 x lb. = gsm 0.26598 x gsm = lb.
19" x 24" 3.0836 x lb. = gsm 0.32429 x gsm = lb.
20" x 26" 2.7041 x lb. = gsm 0.36981 x gsm = lb.
22" x 28" 2.2827 x lb. = gsm 0.43808 x gsm = lb.
22.5" x 28.5" 2.1928 x lb. = gsm 0.45604 x gsm = lb.
22" x 34" 1.8799 x lb. = gsm 0.53196 x gsm = lb.
24" x 36" 1.6275 x lb. = gsm 0.61445 x gsm = lb.
25" x 38" 1.4801 x lb. = gsm 0.67561 x gsm = lb.
25.5" x 30.5" 1.808 x lb. = gsm 0.55311 x gsm = lb.
1000 sq. ft. 4.8824 x lb. = gsm 0.20482 x gsm = lb.
3000 sq. ft. 1.6275 x lb. = gsm 0.61445 x gsm = lb.

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Last updated January 15, 2004.
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