A4 Paper Size in mm, Inches and Points
A4 is 210 x 297 mm (8.27 x 11.69 in, 595 x 842 pt). Letters, forms, reports and most office printing outside North America. It is the page size most PDFs are made in.
| Unit | Width | Height |
|---|---|---|
| Millimetres | 210 mm | 297 mm |
| Centimetres | 21 cm | 29.7 cm |
| Inches | 8.27 in | 11.69 in |
| Points (PDF) | 595.28 pt | 841.89 pt |
| Pixels at 96 dpi | 794 px | 1123 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: 0.0624 m². Landscape: 297 x 210 mm.
A4 in pixels at different resolutions
| Resolution | Size |
|---|---|
| 72 dpi | 595 x 842 px |
| 96 dpi | 794 x 1123 px |
| 150 dpi | 1240 x 1754 px |
| 300 dpi | 2480 x 3508 px |
| 600 dpi | 4961 x 7016 px |
How to check a PDF really is A4
- 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 210 x 297 mm.
- A PDF that says 595 x 842 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: A3 (297 x 420 mm), which has twice the area.
- Next smaller: A5 (148 x 210 mm), half the area.
Frequently asked questions
What is the size of A4 in mm?
A4 is 210 x 297 mm (8.27 x 11.69 in) in portrait.
How many pixels is A4?
At 96 dpi, the size of a CSS pixel on screen, A4 is 794 x 1123 px. At 300 dpi, a common print resolution, it is 2480 x 3508 px.
What is A4 in points (the PDF unit)?
A4 is 595.28 x 841.89 pt, usually rounded to 595 x 842 pt. One point is 1/72 of an inch, and PDF page sizes are stored in points.
Is A4 the same as US Letter?
No. A4 is 210 x 297 mm; US Letter is 215.9 x 279.4 mm (8.5 x 11 in). A4 is 5.9 mm narrower and 17.6 mm taller, so a document made for one can shift or scale when printed on the other.
