Paper weight
250 gsm paper
250 gsm paper equals 66.5 lb bond, 168.9 lb text or 92.5 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.
66.5 lbbond / writing
168.9 lbtext / book
92.5 lbcover
≈ 312 µmthickness (uncoated)
Equivalent US basis weights
| Grade | Pounds | Basic sheet |
|---|---|---|
| Bond / Writing | 66.5 lb | 17 x 22 in |
| Text / Book / Offset | 168.9 lb | 25 x 38 in |
| Cover | 92.5 lb | 20 x 26 in |
| Index | 138.3 lb | 25.5 x 30.5 in |
| Bristol | 114 lb | 22.5 x 28.5 in |
| Newsprint / Tag | 153.6 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 | 312 µm | 12.3 pt | 163 PPI | 1.845 in |
| Bulky book paper | 375 µm | 14.8 pt | 135 PPI | 2.215 in |
| Coated (gloss/silk) | 225 µm | 8.9 pt | 226 PPI | 1.329 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 | 15.59 g | 7.8 kg |
| US Letter | 15.08 g | 16.6 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.