Paper weight
60 gsm paper
60 gsm paper equals 16 lb bond, 40.5 lb text or 22.2 lb cover. Typical uses: book interiors (lightweight), notebooks, forms. Common in mass-market and long paperbacks to control thickness and postage.
16 lbbond / writing
40.5 lbtext / book
22.2 lbcover
≈ 75 µmthickness (uncoated)
Equivalent US basis weights
| Grade | Pounds | Basic sheet |
|---|---|---|
| Bond / Writing | 16 lb | 17 x 22 in |
| Text / Book / Offset | 40.5 lb | 25 x 38 in |
| Cover | 22.2 lb | 20 x 26 in |
| Index | 33.2 lb | 25.5 x 30.5 in |
| Bristol | 27.4 lb | 22.5 x 28.5 in |
| Newsprint / Tag | 36.9 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 | 75 µm | 3 pt | 677 PPI | 0.443 in |
| Bulky book paper | 90 µm | 3.5 pt | 564 PPI | 0.531 in |
| Coated (gloss/silk) | 54 µm | 2.1 pt | 941 PPI | 0.319 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 | 3.74 g | 1.87 kg |
| US Letter | 3.62 g | 4 lb |
What it is used for
Book interiors (lightweight), notebooks, forms. Common in mass-market and long paperbacks to control thickness and postage.