Pounds (basis weight) to grams per square meter
Type a value in lb to get it in gsm instantly.
That's 1.18× as heavy as letterhead, while a flyer is 1.27× heavier. One A4 sheet weighs about 7.4 g.
Convert the other way: gsm to lb
What it means
What paper is that?
US basis weight is the weight of 500 sheets at that grade’s own basic size, which is why each grade converts differently.
The math
How to convert lb to gsm
US basis weight depends on the grade’s basic sheet size, so each grade has its own factor: text ×1.48, cover ×2.708, index ×1.807.
Example: 80 lb = 118.4 gsm.
Pounds below are Text / book. Change the grade and the gsm changes with it.
Every unit
Your paper weight in every unit
Tables
lb to gsm conversion table
| lb | gsm |
|---|---|
| 50 lb | 74 gsm |
| 60 lb | 88.8 gsm |
| 70 lb | 103.6 gsm |
| 80 lb | 118.4 gsm |
| 90 lb | 133.2 gsm |
| 100 lb | 148 gsm |
| 120 lb | 177.6 gsm |
| 150 lb | 222 gsm |
| 200 lb | 296 gsm |
| 250 lb | 370 gsm |
| 300 lb | 444 gsm |
| 350 lb | 518 gsm |
gsm to lb conversion table
| gsm | lb |
|---|---|
| 50 gsm | 33.7838 lb |
| 60 gsm | 40.5405 lb |
| 70 gsm | 47.2973 lb |
| 80 gsm | 54.0541 lb |
| 90 gsm | 60.8108 lb |
| 100 gsm | 67.5676 lb |
| 120 gsm | 81.0811 lb |
| 150 gsm | 101.351 lb |
| 200 gsm | 135.135 lb |
| 250 gsm | 168.919 lb |
| 300 gsm | 202.703 lb |
| 350 gsm | 236.486 lb |
Quick answers
Quick answers
- How many gsm is 1 lb?
- 1 lb is 1.48 gsm.
- How many gsm is 10 lb?
- 10 lb is 14.8 gsm.
- How many gsm is 80 lb?
- 80 lb is 118.4 gsm.
The units
About these units
Pounds (basis weight) (lb)
US basis weight: 500 sheets at the grade’s basic size. Meaningless without knowing the grade.
Grams per square meter (gsm)
The metric standard: the weight of one square meter of the paper, whatever the sheet size.
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