Paper weight
150 gsm paper
150 gsm paper equals 39.9 lb bond, 101.3 lb text or 55.5 lb cover. Typical uses: posters, brochure covers, photo books, art prints. Heavy text weight; folds may need scoring on coated stock.
39.9 lbbond / writing
101.3 lbtext / book
55.5 lbcover
≈ 188 µmthickness (uncoated)
Equivalent US basis weights
| Grade | Pounds | Basic sheet |
|---|---|---|
| Bond / Writing | 39.9 lb | 17 x 22 in |
| Text / Book / Offset | 101.3 lb | 25 x 38 in |
| Cover | 55.5 lb | 20 x 26 in |
| Index | 83 lb | 25.5 x 30.5 in |
| Bristol | 68.4 lb | 22.5 x 28.5 in |
| Newsprint / Tag | 92.2 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 | 188 µm | 7.4 pt | 271 PPI | 1.107 in |
| Bulky book paper | 225 µm | 8.9 pt | 226 PPI | 1.329 in |
| Coated (gloss/silk) | 135 µm | 5.3 pt | 376 PPI | 0.797 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 | 9.36 g | 4.68 kg |
| US Letter | 9.05 g | 10 lb |
What it is used for
Posters, brochure covers, photo books, art prints. Heavy text weight; folds may need scoring on coated stock.