A0 size
841 × 1189 mm · 33.11 × 46.81 in · 2383.9 × 3370.4 pt
Where it comes from
The base sheet: one square metre of paper at the √2 aspect ratio — 841 × 1189 mm, because 0.841 m × 1.189 m ≈ 1.000 m² and 1189/841 ≈ √2.
Derived from the ISO 216 construction — no lookup required, only arithmetic.
Pixels at print resolutions
| DPI | Pixels (portrait) | Typical use |
|---|---|---|
| 72 | 2384 × 3370 | legacy screens |
| 96 | 3179 × 4494 | CSS reference |
| 150 | 4967 × 7022 | everyday print |
| 300 | 9933 × 14043 | quality print |
| 600 | 19866 × 28087 | fine art / line work |
The family
- Fold A0 in half and you get A1 — two of those side by side rebuild this sheet.
- Area: 0.9999 m² — an 80 gsm sheet weighs 79.99 g.