Calculations & Conversions
The ream weight is the weight of 500 sheets; the M weight is the weight of 1,000 sheets. The M weight can be obtained by first finding the ream weight, rounding it by the rounding rules, then multiplying by 2.
| Rounding Rules |
|
Sheet Size |
Ream Weight |
| 864 inches2 or larger |
Ream Weight calculated to nearest pound.
(166 lbs.) |
| 336 inches2 to 864 inches2 |
Ream Weight calculated to nearest half pound.
(166.5 lbs.) |
| Less than 336 inches2 |
Ream Weight calculated to nearest one hundredth 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 1S/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 |
 |
| Example |
| Find the M Weight of a sheet of 43 x 61, basis 60 lb. Offset paper. |
 |
|
