At 300 DPI, A1 needs about 7016×9933 px (portrait). At 150 DPI, about 3508×4967 px.
Why DPI changes the pixel count
Pixels = paper inches × DPI. Doubling DPI roughly doubles each side and quadruples total megapixels.
Portrait vs landscape
Swap width and height for landscape. Bleed and trim may require a few extra millimeters of image.
Pixels needed by DPI
| DPI | Pixels |
|---|---|
| 72 | 1684 × 2384 |
| 100 | 2339 × 3311 |
| 150 | 3508 × 4967 |
| 200 | 4677 × 6622 |
| 240 | 5613 × 7946 |
| 300 | 7016 × 9933 |
| 600 | 14031 × 19866 |
FAQ
How many pixels for A1 at 300 DPI?
About 7016×9933 px in portrait orientation.