Paper weight
80 gsm paper
80 gsm paper equals 21.3 lb bond, 54 lb text or 29.6 lb cover. Typical uses: office copy paper, book interiors, letters. The everyday weight: 75–80 g/m² is standard office paper and typical book text stock.
21.3 lbbond / writing
54 lbtext / book
29.6 lbcover
≈ 100 µmthickness (uncoated)
Equivalent US basis weights
| Grade | Pounds | Basic sheet |
|---|---|---|
| Bond / Writing | 21.3 lb | 17 x 22 in |
| Text / Book / Offset | 54 lb | 25 x 38 in |
| Cover | 29.6 lb | 20 x 26 in |
| Index | 44.2 lb | 25.5 x 30.5 in |
| Bristol | 36.5 lb | 22.5 x 28.5 in |
| Newsprint / Tag | 49.2 lb | 24 x 36 in |
Estimated thickness and pages per inch
| Paper type | Caliper | Points (mil) | Pages per inch | Spine for 300 pp |
|---|---|---|---|---|
| Uncoated offset | 100 µm | 3.9 pt | 508 PPI | 0.591 in |
| Bulky book paper | 120 µm | 4.7 pt | 423 PPI | 0.709 in |
| Coated (gloss/silk) | 72 µm | 2.8 pt | 706 PPI | 0.425 in |
Caliper ≈ grammage × bulk. Ask your printer for the measured caliper of the actual stock.
Sheet and ream weights
| Sheet | One sheet | Ream (500 sheets) |
|---|---|---|
| A4 | 4.99 g | 2.49 kg |
| US Letter | 4.83 g | 5.3 lb |
What it is used for
Office copy paper, book interiors, letters. The everyday weight: 75–80 g/m² is standard office paper and typical book text stock.