Paper & Price Calculators

Equivalent Weight Tables

These tables provide weight in pounds for a ream of a common grade of paper and provides its basis weight and metric equivalent in grams per square meter (GSM).

Book

Bond

Cover

Vellum

Index

Tag

Book

25 × 38

 Bond

17 × 22

 Cover

20 × 26

 Bristol

22½ × 28½

 Index

25½ × 30½

 Tag

24 × 36

 Metric

G/M²
30 11.8 16.4 20.3 24.6 27.3 44
40 15.7 21.9 27 32.7 36.4 59
45 17.7 24.6 30.4 36.9 40.9 67
50 19.7 27.4 33.8 40.9 45.5 74
60 23.6 32.4 40.5 49.1 54.6 89
70 27.6 38.3 47.3 57.3 63.7 104
80 31.6 43.8 54 65.5 72.8 118
90 35.4 49.3 60.8 73.7 81.9 133
100 39.4 54.7 67.5 81.9 90.9 148
120 47.2 65.7 81 98.2 109.1 178
Book

25 × 38

 Bond

17 × 22

 Cover

20 × 26

 Bristol

22½ × 28½

 Index

25½ × 30½

 Tag

24 × 36

 Metric

G/M²
33 13 18.1 22.3 27 30 49
40.6 16 22.2 27.4 33.3 37 60
50.8 20 27.8 34.3 41.6 46.2 75
61 24 33.4 41.1 49.9 55.4 90
71.1 28 38.9 48 58.2 64.7 105
81.3 32 44.5 54.9 66.5 73.9 120
91.4 36 50.1 61.7 74.9 83.2 135
101.6 40 55.6 68.6 83.2 92.4 150
Book

25 × 38

 Bond

17 × 22

 Cover

20 × 26

 Bristol

22½ × 28½

 Index

25½ × 30½

 Tag

24 × 36

 Metric

G/M²
91.3 36 50 61.7 74.8 83.1 135
109.6 43.2 60 74 89.7 99.7 162
118.8 46.8 65 80.2 97.2 108 176
146.2 57.5 80 98.7 119.7 132.9 216
164.4 64.7 90 111 134.6 149.5 243
182.7 71.9 100 123.3 149.6 166.2 271
201 79.1 110 135.6 164.5 182.8 298
237.5 93.5 130 160.3 194.4 216 352
292.3 115.1 160 197.3 239.3 265.8 433
Book

25 × 38

 Bond

17 × 22

 Cover

20 × 26

 Bristol

22½ × 28½

 Index

25½ × 30½

 Tag

24 × 36

 Metric

G/M²
99.3 39.1 54.3 67 81.3 90.3 147
118.5 46.7 64.9 80 97 107.8 176
148.1 58.3 81.1 100 121.3 134.7 219
177.8 81.7 113.5 140 169.8 188.6 307
237 93.3 129.7 160 194.1 215.6 351
Book

25 × 38

 Bond

17 × 22

 Cover

20 × 26

 Bristol

22½ × 28½

 Index

25½ × 30½

 Tag

24 × 36

 Metric

G/M²
109.9 43.3 60.2 74.2 90 100 163
134.4 52.9 73.5 90.7 110 122.2 199
171 67.3 93.6 115.4 140 155.5 253
207.7 81.7 113.7 140.2 170 188.9 307
Book

25 × 38

 Bond

17 × 22

 Cover

20 × 26

 Bristol

22½ × 28½

 Index

25½ × 30½

 Tag

24 × 36

 Metric

G/M²
110 43.3 60.2 74.2 90 100 163
137.4 54.1 75.2 92.8 112.5 125 204
164.9 64.9 90.3 111.3 135 150 244
192.4 75.8 105.3 129.9 157.5 175 285
219.9 86.6 120.4 148.4 180 200 326
274.9 108.2 150.5 185.5 225 250 407

Note: Relevant basis weights are in bold.
The numerical data in these tables are estimates only and are not guaranteed.