Equivalent Basis Weights


Basis Weights


Basis Weights Chart


Paper types are categorized by their base size in the U.S.

These base sizes are used to calculate a paper's basis weight. The basis weight equals the ream (500 sheet) weight of the base size, hence the term basis weight. Because the starting base size is not the same between paper types, the basis weights do not correspond directly (80 Text is much lighter than 80 Cover).

Below is a chart that provides the equivalent basis weights between paper types as well as the corresponding g/m².


Bond (Basis 17 x 22)

Bond Cover Index Bristol Tag Text g/m²
16
22
33
27
37
41
60
20
28
42
34
46
51
75
24
33
50
41
55
61
90
28
39
59
48
65
71
105
32
45
67
55
74
81
120
36
50
75
62
83
91
135

Cover (Basis 20 x 26)

Cover Bond Index Bristol Tag Text g/m²
50
36
75
62
83
91
135
60
43
90
74
100
110
162
65
47
97
80
108
119
176
80
58
120
99
133
146
216
90
65
135
111
150
164
243
100
72
150
123
166
183
270
110
79
165
135
183
201
297
130
94
194
160
216
238
352

Index (Basis 25-1/2 x 30-1/2)

Index Bond Cover Bristol Tag Text g/m²
90
43
60
74
100
110
163
110
53
74
91
122
134
199
140
67
93
115
155
171
253
170
82
114
140
189
208
307

Bristol (Basis 22-1/2 x 28-1/2)

Bristol Bond Cover Index Tag Text g/m²
67
39
54
81
89
99
147
80
47
65
97
108
119
176
100
58
81
121
135
148
219
120
70
97
146
162
178
263

Text (Basis 25 x 38)

Text Bond Cover Index Bristol Tag g/m²
40
16
21
33
27
37
60
50
20
27
41
34
45
74
60
24
32
49
40
55
89
70
28
38
57
47
64
104
80
31
43
66
54
73
118
90
35
48
74
60
82
133
100
39
54
82
67
91
148

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