Equivalent weights of various types of paper in reams of 500 sheets. Common weights are shown in italics.
Equivalents For |
Book |
Bond & |
Cover |
Index |
Vellum |
Tag |
Book |
30 |
12 |
16 |
25 |
20 |
27 |
40 |
16 |
22 |
33 |
27 |
36 |
|
45 |
18 |
25 |
37 |
30 |
41 |
|
50 |
20 |
27 |
41 |
34 |
45 |
|
60 |
24 |
33 |
49 |
41 |
55 |
|
70 |
28 |
38 |
57 |
47 |
64 |
|
80 |
31 |
44 |
65 |
54 |
73 |
|
100 |
39 |
55 |
82 |
68 |
91 |
|
|
||||||
Bond & Writing |
33 |
13 |
18 |
27 |
22 |
30 |
41 |
16 |
22 |
33 |
27 |
37 |
|
51 |
20 |
28 |
42 |
34 |
46 |
|
61 |
24 |
33 |
50 |
41 |
55 |
|
71 |
28 |
39 |
58 |
48 |
65 |
|
81 |
32 |
45 |
67 |
55 |
74 |
|
91 |
36 |
50 |
75 |
62 |
83 |
|
102 |
40 |
56 |
83 |
69 |
92 |
|
|
||||||
Cover |
91 |
36 |
50 |
75 |
62 |
83 |
110 |
43 |
60 |
90 |
74 |
100 |
|
119 |
47 |
65 |
97 |
80 |
108 |
|
146 |
58 |
80 |
120 |
99 |
133 |
|
183 |
72 |
100 |
150 |
123 |
166 |
|
|
||||||
Index Bristol |
110 |
43 |
60 |
90 |
74 |
100 |
135 |
53 |
74 |
110 |
91 |
122 |
|
170 |
67 |
93 |
140 |
115 |
156 |
|
208 |
82 |
114 |
170 |
140 |
189 |
|
|
||||||
Vellum Bristol |
83 |
34 |
47 |
69 |
57 |
77 |
99 |
39 |
54 |
81 |
67 |
90 |
|
119 |
47 |
65 |
97 |
80 |
108 |
|
149 |
57 |
81 |
121 |
100 |
135 |
|
|
||||||
Tag |
110 |
43 |
60 |
90 |
74 |
100 |
137 |
54 |
75 |
113 |
92 |
125 |
|
165 |
65 |
90 |
135 |
111 |
150 |
|
192 |
76 |
105 |
158 |
130 |
175 |
|
220 |
87 |
120 |
180 |
149 |
200 |
|
275 |
108 |
1150 |
225 |
186 |
250 |