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Conversion Factors Chart

This chart shows the approximate caliper of a single sheet for papers of various grades and basis weights. Caliper is expressed in thousandths of an inch.

Conversion Factors
To Convert
Multiply Offset
Basis Weight by:
Offset 25 x 38 to Bond/Writing 17 x 22 0.3937
Cover 20 X 26 0.5474
Vellum Bristol 22 ½  x 28 ½ 0.6750
Index  25 ½  x 30 ½ 0.8187
Tag 24 x 36 0.9095

To Convert
Multiply Bond/Writing
Basis Weight by:
Bond/Writing
17 x 22
to Offset 25 x 38 2.5401
Cover 20 X 26 1.3904
Vellum Bristol 22 ½  x 28 ½ 1.7146
Index  25 ½  x 30 ½ 2.0795
Tag 24 x 36 2.3102

 

Conversion Factors
To Convert
Multiply Cover
Basis Weight by:
Cover 20 X 26 to Offset 25 x 38 1.8269
Bond/Writing 17 x 22 0.7192
Vellum Bristol 22 ½  x 28 ½ 1.2332
Index  25 ½  x 30 ½ 1.4957
Tag 24 x 36 1.6615

To Convert
Multiply Bristol
Basis Weight by:
Vellum Bristol
22 ½  x 28 ½
to Offset 25 x 38 1.4815
Bond/Writing 17 x 22 0.5832
Cover 20 X 26 0.8109
Index  25 ½  x 30 ½ 1.2129
Tag 24 x 36 1.3474

 

Conversion Factors
To Convert
Multiply Index
Basis Weight by:
Index 
25 ½  x 30 ½
to Offset 25 x 38 1.2215
Bond/Writing 17 x 22 0.4809
Cover 20 X 26 0.6686
Vellum Bristol 22 ½  x 28 ½ 0.8245
Tag 24 x 36 1.1109

To Convert
Multiply TAG
Basis Weight by:
Tag 24 x 36 to Offset 25 x 38 1.0995
Bond/Writing 17 x 22 0.4329
Cover 20 X 26 0.6019
Vellum Bristol 22 ½  x 28 ½ 0.7422
Index  25 ½  x 30 ½ 0.9002

TO OUR VISITORS: The results of the Interactive Calculations System are estimates and are not guaranteed by International Paper.