Kraft paper is a commonly used packaging material, and the conversion relationship between its weight and thickness depends on the density of the paper. Usually, the density of paper is about 0.5-0.8 g/cm³, but this value may vary depending on the type of paper and the production process.
Kraft paper weight conversion chart
In paper weight conversion, gram weight (GSM) and weight per square meter are equivalent, both refer to the weight per square meter of paper. The following table contains the conversion relationship between gram weight (GSM), weight per square meter (g/m²), thickness (mm), mill (MIL), and micron (Micron):
| GSM / Weight per Square Meter (g/m²) | Thickness (mm) | Thickness (MIL) | Thickness (Micron) |
| 50 | 0.06 | 0.024 | 60 |
| 100 | 0.12 | 0.048 | 120 |
| 120 | 0.13 | 0.052 | 130 |
| 150 | 0.17 | 0.068 | 170 |
| 230 | 0.27 | 0.108 | 270 |
| 300 | 0.43 | 0.172 | 430 |
| 350 | 0.45 | 0.180 | 450 |
| 400 | 0.49 | 0.196 | 490 |
Please note that the Thickness (MIL) column in the table is calculated based on 1 millimeter equaling 0.03937007874 inches (i.e. 1 MIL), while the Thickness (Micron) column is calculated by multiplying the millimeter value by 1000. These conversion values can help users convert between different units to accommodate different international application requirements.
Calculation formula
If you need a more accurate conversion table, you will need to know the actual density of your specific paper and then convert it using the following formula:
Weight per square meter(g/m²) = thickness(mm) x density (g/cm³) x 1000
For example, if the density of paper is 0.75 g/cm³, then the weight per square meter of 1 mm thick paper would be:
1 x 0.75 x 1000 = 750 g/m²
If you need a more detailed conversion table, or need to convert based on a specific density, please provide the specific density value, please consult us.
