A1 Paper Size in mm, Inches and Points
A1 is 594 x 841 mm (23.39 x 33.11 in, 1684 x 2384 pt). Posters, flip charts and large technical drawings.
| Unit | Width | Height |
|---|---|---|
| Millimetres | 594 mm | 841 mm |
| Centimetres | 59.4 cm | 84.1 cm |
| Inches | 23.39 in | 33.11 in |
| Points (PDF) | 1683.78 pt | 2383.94 pt |
| Pixels at 96 dpi | 2245 px | 3179 px |
The sides are in the ratio 1 : 1.414 (the square root of 2), which is why folding or cutting an A-series sheet in half keeps its shape. Area: 0.4996 m². Landscape: 841 x 594 mm.
A1 in pixels at different resolutions
| Resolution | Size |
|---|---|
| 72 dpi | 1684 x 2384 px |
| 96 dpi | 2245 x 3179 px |
| 150 dpi | 3508 x 4967 px |
| 300 dpi | 7016 x 9933 px |
| 600 dpi | 14031 x 19866 px |
How to check a PDF really is A1
- Open the file in PdfRuler. It runs in your browser and nothing is uploaded.
- Read the page size in the status bar and set the unit to mm. It should read 594 x 841 mm.
- A PDF that says 1684 x 2384 pt is the same sheet rounded to whole points, so mm may differ by a fraction. That is normal; see what a PDF point is.
Printing it? Check your printer does not rescale the page with the print at actual size test sheet.
Related sizes
- Next larger: A0 (841 x 1189 mm), which has twice the area.
- Next smaller: A2 (420 x 594 mm), half the area.
Frequently asked questions
What is the size of A1 in mm?
A1 is 594 x 841 mm (23.39 x 33.11 in) in portrait.
How many pixels is A1?
At 96 dpi, the size of a CSS pixel on screen, A1 is 2245 x 3179 px. At 300 dpi, a common print resolution, it is 7016 x 9933 px.
What is A1 in points (the PDF unit)?
A1 is 1683.78 x 2383.94 pt, usually rounded to 1684 x 2384 pt. One point is 1/72 of an inch, and PDF page sizes are stored in points.
