| Rounding Rules |
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| Sheet Size |
Ream Weight |
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| 864 inches2 or larger |
Ream Weight calculated to nearest pound. |
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| (166 lbs.) |
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| 336 inches2 to 864 inches2 |
Ream Weight calculated to nearest half pound. |
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| (166.5 lbs.) |
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| Less than 336 inches2 |
Ream Weight calculated to nearest one hundredth of a pound. (166.55 lbs.) |
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| Basic Sizes |
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| Bond |
17 x 22 = 374 square inches |
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| Book & Offset |
25 x 38 = 950 square inches |
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| Tag |
24 x 36 = 864 square inches |
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| Index |
25.5 x 30.5 = 778 square inches |
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| Vellum Bristol |
22.5 x 30.5 = 686 square inches |
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| Coated Cover 1S/C2S |
24 x 36 = 864 square inches |
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| Coated Cover C2S |
20 x 26 = 520 square inches |
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| C1S Label |
25 x 38 = 950 square inches |
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| Opaque Cover |
20 x 26 = 520 square inches |
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| Formula |
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(Basis Weight x 1406.5) / Basic Size
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| Example |
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| Convert 17 x 22, 28 lb. Bond/Writing paper to grams per square meter. |
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| (28 x 1406.5) / 374
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| Formula |
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| Example |
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| Find the M Weight of a sheet of 43 x 61, basis 60 lb. Offset paper. |
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| Example |
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| Find the footage of a roll of basis 50 lb. Offset paper, 26" wide and weighing 100 lbs. |
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| Formula |
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| Example |
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| Find the weight of a roll of forms bond paper with a roll diameter of 40 inches, a core diameter of 3 inches, and a roll width of 17.5 inches. |
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| Note: .021 is the appropriate factor for forms bond paper. |
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| Example |
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| Find the pages per inch for Coated Cover Paper with a caliper of .010. |
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Note: 25 x 38 is the basic size of offset paper
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