Paper Weight (GSM) Calculator
Weight of a sheet and of a whole ream, from the sheet size and grammage.
Results
Mass
2.4948
kg
Mass
4.9896
g
Area
0.06237
m²
Area
31.185
m²
What this tool does
Grammage is always grams per square metre regardless of the sheet size, which is why the same 80 gsm paper weighs quite different amounts in A4 and A3. Knowing the weight of a stack matters for postage, for shipping and for whether a shelf will take it.
Formula
weight = area × grammage × sheets
Variables
| Symbol | Meaning | Unit |
|---|---|---|
w | Width | mm |
h | Height | mm |
gsm | Grammage | g/m² |
n | Number of sheets | — |
TW | Mass | kg |
SW | Mass | g |
A | Area | m² |
AT | Area | m² |
Worked example
- Width210 mm
- Height297 mm
- Grammage80 g/m²
- Number of sheets500
- Mass2.4948 kg
- Mass4.9896 g
- Area0.06237 m²
- Area31.185 m²
Limitations
- The result is an estimate based only on the values you type. Real situations often include factors this calculator does not know about.
- Mixing units is the most common source of error. Convert every input to the units shown next to each field before calculating.