 
Paper weights
and conversion tables
In
an effort to help explain paper weights we have compiled the comprehensive
table listed below.
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 is
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" 
251/2" x
301/2" 
Basis Weight ("Equivalent") Table
The Values in the table below are intended to serve as a guide only.
They should not be used as specifications because there are
variances
within the same basis weight due to other characteristics of the
papers.
Similar weight papers may vary between different paper manufacturers.
To use the chart read across to find the equivalent,
example 16 Lb. Bond paper weight is equivalent to 40 Lb. Offset paper
weight
Bond 
Offset
Text 
Cover 
Tag 
Index 
Points 
Caliper
(inches)* 
Millimeters 
Metric
(grams/sq meter) 
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 
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 
* Normal paper manufacturing tolerance within a paper production
run is + or  5% to 7% caliper
International Metric Paper Sizes  ISO Standard
SIZE 
WIDTH
(mm) 
HEIGHT
(mm) 
WIDTH
(inches) 
HEIGHT
(inches) 
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 
728 mm 
1,028 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. 
Reference
Charts for Common Envelope Sizes
Commercial / Official Sizes
( Commercial Flap; unless noted) 
No. 
Inches 
Millimeters 
6 1/4 
3 1/2 x 6 
89 x 152 
6 3/4 
3 5/8 x 6 1/2 
92 x 165 
7 
3 3/4 x 6 3/4 
95 x 171 
Monarch (pointed Flap) 
3 7/8 x 7 1/2 
98 x 191 
8 5/8 
3 5/8 x 8 5/8 
92 x 219 
9 
3 7/8 x 8 7/8 
98 x 225 
10 (also Square Flap) 
4 1/8 x 9 1/2 
105 x 241 
11 (also Square Flap) 
4 1/2 x 10 3/8 
114 x 264 
12 (also Square Flap) 
4 3/4 x 11 
121 x 279 
14 (also Square Flap) 
5 x 11 1/2 
127 x 292 
Booklet (Wallet Flap) 
No. 
Inches 
Millimeters 
3 
4 3/4 x 6 1/2 
121 x 165 
5 
5 1/2 x 8 1/8 
140 x 206 
6 
5 3/4 x 8 7/8 
146 x 225 
6 1/2 

152 x 229 
6 5/8 
6 x 9 1/2 
152 x 241 
6 3/4 
6 1/2 x 9 1/2 
165 x 241 
7 1/4 
7 x 10 
178 x 254 
7 1/2 
7 1/2 x 10 1/2 
191 x 267 
9 
8 3/4 x 11 1/2 
222 x 292 
9 1/2 
9 x 12 
229 x 305 
10 
9 1/2 x 12 5/8 
241 x 321 
13 
10 x 13 
254 x 330 
Window (Commercial Flap) 
No. 
Inches 
Millimeters 
6 1/4 
3 1/2 x 6 
89 x 152 
6 3/4 
3 5/8 x 6 1/2 
92 x 165 
7 
3 3/4 x 6 3/4 
95 x 171 
Monarch 
3 7/8 x 7 1/2 
98 x 191 
8 5/8 
3 5/8 x 8 5/8 
92 x 219 
9 
3 7/8 x 8 7/8 
98 x 225 
10 
4 1/8 x 9 1/2 
105 x 241 
11 
4 1/2 x 10 3/8 
114 x 264 
12 
4 3/4 x 11 
121 x 279 
14 
5 x 11 1/2 
127 x 292 
Announcement (Square Flap) 
No. 
Inches 
Millimeters 
A2 

111 x 146 
A6 
4 3/4 x 6 1/2 
121 x 165 
A7 
5 1/4 x 7 1/4 
133 x 184 
A8 
5 1/2 x 8 1/8 
140 x 206 
A9 


A10 
6 x 9 1/2 
152 x 241 
Slimline 
3 7/8 x 8 7/8 
98 x 225 
Baronial (Pointed Flap) 
No. 
Inches 
Millimeters 
4 
3 5/8 x 5 1/8 
92 x 130 
5 
4 1/8 x 5 1/2 
105 x 140 
5 1/2 

111 x 146 
6 
4 3/4 x 6 1/2 
121 x 165 
Lee 
5 1/4 x 7 1/4 
133 x 184 
HELPFUL GUIDELINES for Inkjet Paper
Prior to use, paper should be allowed to acclimate at least
48 Hours in the environment in which it will be used.
Optimum storage facility would retain temperatures between
7080 degrees F with 50% relative humidity.
Before loading paper, fan the sheets on all four sides. This
creates a small layer of air between the sheets which should
help printer feeding mechanisms.
Do Not Stack Materials. Feed into printer one sheet at a time.
Load Materials according to the instructions in the printer
owner's manual.
Recommended feeding is generally to use the manual feed tray,
or the straightest path through the printer.
Upon Completion, the unused material should be stored in a
closed package, resealed and stored flat.
ADDITIONAL CONVERSION TABLES
How to Convert to Metric
Length and Distance
When you
know 
Multiply
by 
To Find 
inches 
2.54 
centimeters 
feet 
30.480 
centimeters 
miles 
1.609 
kilometers 
centimeters 
0.394 
inches 
meters 
1.094 
yards 
kilometers 
0.621 
miles 
Weight
When you
know 
Multiply
by 
To Find 
pounds 
0.454 
kilograms 
tons 
0.907 
metric tons 
kilograms 
2.205 
pounds 
metric tons 
1.202 
tons 
Temperature
When you know 
Do This 
To Find 
degrees
Fahrenheit 
Subtract 32
multiply by 5/9 
degrees
Celsius 
degrees
Celsius 
Multiply by 9/5
then add 32 
degrees
Fahrenheit 
Surface or Area
When you know 
Multiply by 
To Find 
square feet 
0.093 
square meters 
square miles 
2.590 
square kilometers 
square centimeters 
0.155 
square inches 
square kilometers 
0.386 
square miles 
Decimal Equivalents
1/64 
= 
0.015625 
1/16 
= 
0.0625 
1/8 
= 
0.125 
3/16 
= 
0.1875 
1/4 
= 
0.25 
5/16 
= 
0.3125 
3/8 
= 
0.375 
7/16 
= 
0.4375 
1/2 
= 
0.5 
9/16 
= 
0.5625 
5/8 
= 
0.625 
11/16 
= 
0.6875 
3/4 
= 
0.75 
13/16 
= 
0.8125 
7/8 
= 
0.875 
15/16 
= 
0.9375 
1 
= 
1.0 


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