A1 paper size
A1 is part of the ISO A range (ISO 216). Commonly used for posters, flip charts.
All units
| Unit | Width | Height |
|---|---|---|
| Millimetres | 594 | 841 |
| Centimetres | 59.4 | 84.1 |
| Inches | 23.386 | 33.11 |
| Points (PostScript) | 1683.8 | 2383.9 |
Pixel dimensions by resolution
Pixels are not a property of the paper — they depend on the resolution you print at. Build the document at the size you will actually output.
| Resolution | Pixels (W × H) | Use for |
|---|---|---|
| 72 DPI | 1,684 × 2,384 | Screen and web only |
| 96 DPI | 2,245 × 3,179 | Windows screen default |
| 150 DPI | 3,508 × 4,967 | Draft and home printing |
| 300 DPI | 7,016 × 9,933 | Standard for commercial print and print-on-demand |
| 600 DPI | 14,031 × 19,866 | Fine art and high-detail line work |
300 DPI is the number you want in almost every case. Print-on-demand services, Etsy printables and commercial printers all expect it. Exporting at 72 DPI and enlarging does not add detail — it just prints the same pixels bigger and softer.
Other ISO A sizes
| Size | mm | inches | px at 300 DPI |
|---|---|---|---|
| A0 | 841 × 1189 | 33.11 × 46.81 | 9,933 × 14,043 |
| A2 | 420 × 594 | 16.54 × 23.39 | 4,961 × 7,016 |
| A3 | 297 × 420 | 11.69 × 16.54 | 3,508 × 4,961 |
| A4 | 210 × 297 | 8.27 × 11.69 | 2,480 × 3,508 |
| A5 | 148 × 210 | 5.83 × 8.27 | 1,748 × 2,480 |
| A6 | 105 × 148 | 4.13 × 5.83 | 1,240 × 1,748 |
| A7 | 74 × 105 | 2.91 × 4.13 | 874 × 1,240 |
| A8 | 52 × 74 | 2.05 × 2.91 | 614 × 874 |
| A9 | 37 × 52 | 1.46 × 2.05 | 437 × 614 |
| A10 | 26 × 37 | 1.02 × 1.46 | 307 × 437 |
Common questions
What size is A1 in millimetres?
A1 is 594 × 841 mm.
What size is A1 in inches?
23.386 × 33.11 inches, which is 59.4 × 84.1 cm.
How many pixels is A1 at 300 DPI?
7,016 × 9,933 pixels. That is the canvas size to use for anything going to a commercial printer. For screen-only use, 72 DPI gives 1,684 × 2,384 px.
What is A1 used for?
Posters, flip charts.
Why does A1 have that unusual aspect ratio?
Every ISO size has a 1:√2 ratio (about 1:1.414). Halving the long side gives the next size down with the same proportions, so artwork scales between sizes without leaving a margin or needing to be cropped.