Paper weight
450 gsm paper
450 gsm paper equals 119.7 lb bond, 304 lb text or 166.4 lb cover. Typical uses: luxury business cards, packaging, rigid tags. Very heavy board; usually needs specialist finishing.
119.7 lbbond / writing
304 lbtext / book
166.4 lbcover
≈ 562 µmthickness (uncoated)
Equivalent US basis weights
| Grade | Pounds | Basic sheet |
|---|---|---|
| Bond / Writing | 119.7 lb | 17 x 22 in |
| Text / Book / Offset | 304 lb | 25 x 38 in |
| Cover | 166.4 lb | 20 x 26 in |
| Index | 248.9 lb | 25.5 x 30.5 in |
| Bristol | 205.2 lb | 22.5 x 28.5 in |
| Newsprint / Tag | 276.5 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 | 562 µm | 22.1 pt | 90 PPI | 3.322 in |
| Bulky book paper | 675 µm | 26.6 pt | 75 PPI | 3.986 in |
| Coated (gloss/silk) | 405 µm | 15.9 pt | 125 PPI | 2.392 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 | 28.07 g | 14.03 kg |
| US Letter | 27.15 g | 29.9 lb |
What it is used for
Luxury business cards, packaging, rigid tags. Very heavy board; usually needs specialist finishing.