## Let's End the Confusion

In an effort to help eliminate the "Paper Weight" confusion problem,
we have compiled the comprehensive table listed below.
Now you can compare various types of paper and their "Equivalent Weights."

### Definitions:

• Basis Weight
The basis weight of a paper is the designated fixed weight of 500 sheets,
measured in pounds, in that paper's basic sheet size.
It is important to note that the "basic sheet size" is not the same
for all types of paper.
• Caliper
Caliper refers to the thickness of a sheet of paper expressed
in thousandth of an inch. This measurement is taken with a micro meter.
Normally, paper caliper should not have more than a + or - 5% variance
within a sheet. Generally, the relation between caliper and basis weight ....
the greater the caliper (the thicker the paper), the greater the paper weight.
• Equivalent Weight
While different paper types have different basic sizes,
papers can still be compared by using equivalent weight.

### Basis Weight ("Category") Table

 Type Paper Basic Size - 500 Sheets "Bond" Ledger Mimeo Duplicator Rag Paper 17" x 22" "Offset" Book Text Coated Paper 25" x 38" "Cover" 20" x 26" "Tag Stock" 24" x 36" "Index" 25-1/2" x 30-1/2"

 --Bond Ledger -Offset Text - Cover - -- Tag -- - Index - - Points - - *Caliper (inches) -- millimeters -- - Metric (grams/sq meter) Equivalent  Weight 16 40 22 37 33 3.2 .0032 0.081 60.2 gsm 18 45 24 41 37 3.6 .0036 0.092 67.72 gsm 20 50 28 46 42 3.8 .0038 0.097 75.2 gsm 24 60 33 56 50 4.8 .0048 0.12 90.3 gsm 28 70 39 64 58 5.8 .0058 0.147 105.35 gsm 29 73 40 62 60 6 .0060 0.152 109.11 gsm 31 81 45 73 66 6.1 .0061 0.155 116.63 gsm 32 85 45 74 67 6.15 .00615 0.156 120 gsm 35 90 48 80 74 6.2 .0062 0.157 131.68 gsm 36 90 50 82 75 6.8 .0068 0.173 135.45 gsm 39 100 54 90 81 7.2 .0072 0.183 146.73 gsm 40 100 56 93 83 7.3 .0073 0.185 150.5 gsm 43 110 60 100 90 7.4 .0074 0.188 161.78 gsm 44 110 61 102 92 7.6 .0076 0.193 165.55 gsm 47 120 65 108 97 8 .0078 0.198 176.83 gsm 53 135 74 122 110 9 .0085 0.216 199.41 gsm 54 137 75 125 113 9 .009 0.229 203.17 gsm 58 146 80 134 120 9.5 .0092 0.234 218.22 gsm 65 165 90 150 135 10 .0095 0.241 244.56 gsm 67 170 93 156 140 10.5 .010 0.25 252.08 gsm 72 183 100 166 150 11 .011 0.289 270.9 gsm 76 192 105 175 158 13 .013 0.33 285.95 gsm 82 208 114 189 170 14 .014 0.356 308.52 gsm 87 220 120 200 180 15 .015 0.38 312 gsm 105 267 146 244 220 18 .0175 0.445 385.06 gsm

International Metric Paper Sizes - ISO Standard

 SIZE WIDTH (mm) HEIGHT (mm) WIDTH (in.) HEIGHT(in.) A0 841 mm 1,189 mm 33.11 in. 46.81 in. A1 594 mm 841 mm 23.39 in. 33.11 in. A2 420 mm 594 mm 16.54 in. 23.39 in. A3 297 mm 420 mm 11.69 in. 16.54 in. A4 210 mm 297 mm 8.27 in. 11.69 in. A5 148 mm 210 mm 5.83 in. 8.27 in. A6 105 mm 148 mm 4.13 in. 5.83 in. A7 74 mm 105 mm 2.91 in. 4.13 in. B0 1,028 mm 1,456 mm 40.48 in. 57.32 in. B1 707 mm 1,000 mm 28.66 in. 40.48 in. B2 514 mm 728 mm 20.24 in. 28.66 B3 364 mm 514 mm 14.33 in. 20.24 in. B4 257 mm 364 mm 10.12 in. 14.33 in. B5 182 mm 257 mm 7.17 in. 10.12 in. B6 128 mm 182 mm 5.04 in. 7.17 in.

8.5in. x 11in. = 215.9mm x 279.4mm
11in. x 17in. = 279.4mm x 431.8mm
12in. x 18in. = 304.8mm x 457.2mm