ISO A series
A1 paper size
A1 measures 594 x 841 mm (23.39 x 33.11 in). Posters, flip charts, technical drawings.
594 x 841millimetres
23.39 x 33.11inches
7,016 x 9,933pixels @ 300 dpi
Dimensions in every unit
| Unit | Width x height |
|---|---|
| Millimetres | 594 x 841 mm |
| Centimetres | 59.4 x 84.1 cm |
| Inches (decimal) | 23.386 x 33.11 in |
| Inches (fraction) | 23 3/8 x 33 1/8 in |
| Points (1/72 in) | 1683.8 x 2383.9 pt |
| Picas | 140.31 x 198.66 pc |
Pixel dimensions by resolution
| Resolution | Pixels | Megapixels |
|---|---|---|
| 72 dpi | 1,684 x 2,384 px | 4 MP |
| 96 dpi | 2,245 x 3,179 px | 7.1 MP |
| 150 dpi | 3,508 x 4,967 px | 17.4 MP |
| 200 dpi | 4,677 x 6,622 px | 31 MP |
| 300 dpi | 7,016 x 9,933 px | 69.7 MP |
| 600 dpi | 14,031 x 19,866 px | 278.8 MP |
300 dpi is the usual target for printed photos and artwork; 72–96 dpi is screen resolution.
Document size with bleed
| Bleed | Millimetres | Inches |
|---|---|---|
| 3 mm bleed (each side) | 600 x 847 mm | 23.622 x 33.346 in |
| 0.125 in bleed (each side) | 600.4 x 847.4 mm | 23.636 x 33.36 in |
How many A1 fit on a press sheet
| Sheet | Without bleed | With 3 mm bleed |
|---|---|---|
| B1 (offset) | 1-up | 1-up |
Simple grid imposition with no gutters or gripper margin; real layouts may fit fewer.
The √2 system
A1 has an aspect ratio of 1 : 1.4158 — close to √2 (1.4142). Folding or cutting it in half across the long side produces the next smaller size in the series with the same proportions, and two sheets side by side form the next larger size. This is why scaling between sizes in the series (for example on a photocopier) never crops or distorts the page.
Similar sizes
Frequently asked questions
What are the dimensions of A1?
A1 is 594 x 841 mm, which is 23.39 x 33.11 in (23 3/8 x 33 1/8 in).
How many pixels is A1 at 300 DPI?
7,016 x 9,933 pixels at 300 dpi, or 3,508 x 4,967 at 150 dpi.
Sources & data
- Dimensions per the relevant standard; see sources.