Paper weight
230 gsm paper
230 gsm paper equals 61.2 lb bond, 155.4 lb text or 85.1 lb cover. Typical uses: paperback covers, postcards, greeting cards, folders. Light card: most paperback covers are printed on roughly 220–270 g/m² cover stock.
61.2 lbbond / writing
155.4 lbtext / book
85.1 lbcover
≈ 288 µmthickness (uncoated)
Equivalent US basis weights
| Grade | Pounds | Basic sheet |
|---|---|---|
| Bond / Writing | 61.2 lb | 17 x 22 in |
| Text / Book / Offset | 155.4 lb | 25 x 38 in |
| Cover | 85.1 lb | 20 x 26 in |
| Index | 127.2 lb | 25.5 x 30.5 in |
| Bristol | 104.9 lb | 22.5 x 28.5 in |
| Newsprint / Tag | 141.3 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 | 288 µm | 11.3 pt | 177 PPI | 1.698 in |
| Bulky book paper | 345 µm | 13.6 pt | 147 PPI | 2.037 in |
| Coated (gloss/silk) | 207 µm | 8.1 pt | 245 PPI | 1.222 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 | 14.35 g | 7.17 kg |
| US Letter | 13.87 g | 15.3 lb |
What it is used for
Paperback covers, postcards, greeting cards, folders. Light card: most paperback covers are printed on roughly 220–270 g/m² cover stock.