Paper weight
70 gsm paper
70 gsm paper equals 18.6 lb bond, 47.3 lb text or 25.9 lb cover. Typical uses: office copy paper, book interiors, letters. The everyday weight: 75–80 g/m² is standard office paper and typical book text stock.
18.6 lbbond / writing
47.3 lbtext / book
25.9 lbcover
≈ 88 µmthickness (uncoated)
Equivalent US basis weights
| Grade | Pounds | Basic sheet |
|---|---|---|
| Bond / Writing | 18.6 lb | 17 x 22 in |
| Text / Book / Offset | 47.3 lb | 25 x 38 in |
| Cover | 25.9 lb | 20 x 26 in |
| Index | 38.7 lb | 25.5 x 30.5 in |
| Bristol | 31.9 lb | 22.5 x 28.5 in |
| Newsprint / Tag | 43 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 | 88 µm | 3.4 pt | 581 PPI | 0.517 in |
| Bulky book paper | 105 µm | 4.1 pt | 484 PPI | 0.62 in |
| Coated (gloss/silk) | 63 µm | 2.5 pt | 806 PPI | 0.372 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 | 4.37 g | 2.18 kg |
| US Letter | 4.22 g | 4.7 lb |
What it is used for
Office copy paper, book interiors, letters. The everyday weight: 75–80 g/m² is standard office paper and typical book text stock.