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Calculators

Use our Paper Calculators to figure out how much paper you need.

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M Weight

To determine the M weight of any given size sheet, multiply the square inches in the given size by the given basis weight; divide the result by the square inch area of the basic size; round the result by the rounding rules and multiply by two.

Given Size
in
in
Basis Weight
lbs
Basic Size
in
in
Rounding Rules
Sheet Size Ream Weight
864 inches or larger Ream Weight calculated to nearest pound. (166 lbs).
336 inches to 864 inches Ream Weight calculated to nearest half pound. (166.5 lbs).
Less than 336 inches Ream Weight calculated to nearest one hundreth of a pound. (166.55 lbs).
Basic Sizes
Bond 17 x 22 = 374 square inches
Book & Offset 25 x 38 = 950 square inches
Tag 24 x 36 = 864 square inches
Index 25.5 x 30.5 = 778 square inches
Vellum Bristol 22.5 x 28.5 = 641 square inches
Coated Cover C1S/C2S 24 x 36 = 864 square inches
Coated Cover C2S 20 x 26 = 520 square inches
C1S Label 25 x 38 = 950 square inches
Opaque Cover 20 x 26 = 520 square inches
Formula
Given Sheet Size × Basis Weight
Area of Basic Size
= Rounded Ream Weight × 2 = MWEIGHT
Example

Find the M Weight of a sheet of 43 x 61, basis 60 lb. Offset paper.

(43 × 61) × 60
25 × 38
>= 166 lbs. × 2 = 332

To our visitors: the results of the Interactive Calculations System are estimates and are not guaranteed by Sylvamo.