The following table shows equivalent weights for different grades of paper.

 GSM  Bond  Text/Book  Cover  Bristol  Index  Tag
0 GSM 0 lb 0 lb 0 lb 0 lb 0 lb 0 lb
60 GSM 16 lb 41 lb 22 lb 27 lb 33 lb 37 lb
64 GSM 17 lb 43 lb 24 lb 29 lb 35 lb 39 lb
75 GSM 20 lb 50 lb 28 lb 34 lb 42 lb 46 lb
80 GSM 21 lb 54 lb 30 lb 36 lb 44 lb 49 lb
90 GSM 24 lb 60 lb 33 lb 41 lb 50 lb 55 lb
100 GSM 27 lb 68 lb 37 lb 45 lb 55 lb 61 lb
105 GSM 28 lb 70 lb 39 lb 49 lb 58 lb 65 lb
110 GSM 29 lb 74 lb 41 lb 50 lb 61 lb 68 lb
120 GSM 32 lb 80 lb 44 lb 55 lb 67 lb 74 lb
135 GSM 36 lb 90 lb 50 lb 62 lb 75 lb 83 lb
148 GSM 39 lb 100 lb 55 lb 67 lb 82 lb 91 lb
150 GSM 40 lb 101 lb 55 lb 68 lb 83 lb 92 lb
163 GSM 43 lb 110 lb 60 lb 74 lb 90 lb 100 lb
165 GSM 43 lb 110 lb 60 lb 74 lb 90 lb 100 lb
170 GSM 45 lb 115 lb 63 lb 77 lb 94 lb 104 lb
176 GSM 47 lb 119 lb 65 lb 80 lb 97 lb 108 lb
190 GSM 51 lb 128 lb 70 lb 86 lb 105 lb 117 lb
199 GSM 53 lb 134 lb 74 lb 90 lb 110 lb 122 lb
203 GSM 54 lb 137 lb 75 lb 93 lb 113 lb 125 lb
216 GSM 58 lb 146 lb 80 lb 98 lb 120 lb 133 lb
244 GSM 65 lb 165 lb 90 lb 111 lb 135 lb 150 lb
250 GSM 66 lb 169 lb 92 lb 114 lb 138 lb 154 lb
253 GSM 67 lb 171 lb 94 lb 115 lb 140 lb 155 lb
264 GSM 70 lb 178 lb 98 lb 120 lb 146 lb 162 lb
271 GSM 72 lb 183 lb 100 lb 123 lb 150 lb 166 lb