Guides / A4 paper size
Paper size reference
A4 measures exactly 210 × 297 millimeters. Here are the equivalent dimensions in centimeters and inches, plus the correct pixel size for common screen and print resolutions.
A4 at a glance
A4 is 210 millimeters wide and 297 millimeters high in portrait orientation. That equals 21 × 29.7 centimeters or approximately 8.27 × 11.69 inches. Landscape A4 uses the same sheet with width and height reversed.
| Unit | Portrait | Landscape |
|---|---|---|
| Millimeters | 210 × 297 mm | 297 × 210 mm |
| Centimeters | 21 × 29.7 cm | 29.7 × 21 cm |
| Inches | 8.27 × 11.69 in | 11.69 × 8.27 in |
| Points | 595 × 842 pt | 842 × 595 pt |
The dimensions come from ISO 216, the international standard for trimmed A- and B-series paper. The inch values are rounded because the standard defines A4 in millimeters.
Preparing a smaller flyer or a folded booklet? See the A5 paper size guide for its dimensions, how A4 folds into A5-sized panels, and print-layout allowances.
A4 has no single pixel size. Pixels describe a digital image, while A4 describes a physical sheet. The correct width and height depend on the intended pixels per inch (PPI).
| Resolution | Portrait pixels | Typical use |
|---|---|---|
| 72 PPI | 595 × 842 px | Basic screen preview |
| 96 PPI | 794 × 1123 px | Common screen/CSS reference |
| 150 PPI | 1240 × 1754 px | Draft or everyday print |
| 200 PPI | 1654 × 2339 px | Good-quality print |
| 300 PPI | 2480 × 3508 px | High-quality print |
| 600 PPI | 4961 × 7016 px | Detailed line art or archival scan |
For landscape, reverse the two pixel dimensions. For example, A4 landscape at 300 PPI is 3508 × 2480 pixels.
Use the pixel dimensions required by the website or app. If no requirement is given, 794 × 1123 pixels at the A4 aspect ratio is a practical lightweight preview.
150–200 PPI is often sufficient for drafts, handouts, or images viewed at a normal distance.
Use 2480 × 3508 pixels at 300 PPI when the source has enough detail. A larger pixel count cannot restore detail missing from a small original.
Convert the millimeter dimensions to inches, then multiply by the required PPI:
pixels = millimeters ÷ 25.4 × PPIAt 300 PPI, the width is 210 ÷ 25.4 × 300 = 2480.31 pixels, and the height is 297 ÷ 25.4 × 300 = 3507.87 pixels. Rounding to whole pixels gives 2480 × 3508.
The A-series uses an aspect ratio of 1:√2, or roughly 1:1.414. A normal camera photo usually has a different shape, so entering A4 dimensions without cropping may add distortion if the aspect ratio is unlocked.
If the exported image is too large for an upload form, use the image compressor after resizing it.
A4 and US Letter are close but not interchangeable. US Letter is 8.5 × 11 inches (215.9 × 279.4 mm), so it is wider and shorter than A4. Printing an A4 document on Letter paper can introduce scaling or change the margins; check the paper size in both the document and printer dialog.
To change only a JPG or PNG’s print-resolution tag without changing its pixels, use the DPI converter. If you need the pixel dimensions in the table above, resize first, then set the DPI.
No. A4 remains 210 × 297 mm. Changing PPI or DPI changes how many image pixels or printer dots are assigned across that physical area. It affects digital dimensions and potential print detail, not the sheet itself.
A4 paper is approximately 8.27 inches wide by 11.69 inches high in portrait orientation.
A4 is exactly 21 × 29.7 centimeters, or 210 × 297 millimeters.
A4 is 2480 × 3508 pixels at 300 pixels per inch after rounding to whole pixels.
No. A4 is 210 × 297 mm (8.27 × 11.69 in), while US Letter is 8.5 × 11 inches. A4 is slightly narrower and taller.
Landscape A4 uses the same physical size with the sides reversed: 297 × 210 mm, 29.7 × 21 cm, or about 11.69 × 8.27 inches.
Image resizer
Set exact pixel dimensions, preserve the aspect ratio, and download the result locally.