Approximate Calculation
The grammage, also known as basis weight, is derived from the area of 1m2. This area is almost equal to the A0 format, meaning that a sheet with a grammage of 150 g/m2 in A0 format weighs approximately 150g. A sheet in A1 format weighs half as much, and you can proceed in a sequential series (A2, A3, A4, ...).
| format | grammage multiplier | format | grammage multiplier | format | grammage multiplier |
| A0 | 1 | A3 | 1/8 | A6 | 1/64 |
| A1 | 1/2 | A4 | 1/16 | A7 | 1/128 |
| A2 | 1/4 | A5 | 1/32 | A8 | 1/256 |
Exact Calculation of Sheet Weight
(length of sheet m x width of sheet m x grammage g/m2) / 1000g = weight of 1 sheet in kg
Example: How much does a pack of 200 sheets of drawing cardboard in A4 format with a grammage of 180 g/m2 weigh?
200 sheets x (0.210 m x 0.297 m x 180 g/m2) / 1000g = 2.25 kg
Examples of Grammages of Our Products
| our product | grammage |
| millimeter paper | 80 g/m2 |
| sketchbook, gray paper | 90 g/m2 |
| sketch pad, drawing cardboard | 180 g/m2 |
| white drawing cardboard | 220 g/m2 |
| colored corrugated cardboard | 260 g/m2 |