Calculators
Use our Paper Calculators to figure out how much paper you need.
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Basis Weight
To convert basis weight of a given standard size of paper to grams per square meter (GSM), multiply its basis weight by 1406.5 and divide the results by the area of its basic size.
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
Basis Weight × 1406.5
Area of Basic Size
Area of Basic Size
= Basis Weight (GSM)
Example
Convert 17 x 22, 28 lb. Bond/Writing paper to grams per square meter.
28 × 1406.5
17 × 22 = 374
17 × 22 = 374
≈ 105.3 GSM
To our visitors: the results of the Interactive Calculations System are estimates and are not guaranteed by Sylvamo.