Paper size reference
Look up the exact dimensions of each standardized paper size (ISO A0 to A10 series, US Letter, US Legal) in millimeters, centimeters, inches, and pixels at a chosen resolution. Everything is calculated locally in your browser.
| Millimeters | 210 × 297 mm |
| Centimeters | 21.0 × 29.7 cm |
| Inches | 8.27 × 11.69 in |
| Pixels at 300 DPI | 2480 × 3508 px |
| Format | mm | inches |
|---|---|---|
| A0 | 841 × 1189 | 33.11 × 46.81 |
| A1 | 594 × 841 | 23.39 × 33.11 |
| A2 | 420 × 594 | 16.54 × 23.39 |
| A3 | 297 × 420 | 11.69 × 16.54 |
| A4 | 210 × 297 | 8.27 × 11.69 |
| A5 | 148 × 210 | 5.83 × 8.27 |
| A6 | 105 × 148 | 4.13 × 5.83 |
| A7 | 74 × 105 | 2.91 × 4.13 |
| A8 | 52 × 74 | 2.05 × 2.91 |
| A9 | 37 × 52 | 1.46 × 2.05 |
| A10 | 26 × 37 | 1.02 × 1.46 |
| US Letter | 215.9 × 279.4 | 8.50 × 11.00 |
| US Legal | 215.9 × 355.6 | 8.50 × 14.00 |
| US Tabloid | 279.4 × 431.8 | 11.00 × 17.00 |
How it works
The ISO 216 series formats (A0 to A10) follow a simple rule: each size is obtained by folding the previous one in half along its length, and the width/height ratio (1:√2) stays constant at each division. American formats (Letter, Legal, Tabloid), on the other hand, don't follow this logic and keep different proportions from one size to the next.
How do I convert a paper size to pixels for a digital document?
The number of pixels depends on the chosen resolution (expressed in DPI, dots per inch). You first convert the paper dimension to inches, then multiply by the desired resolution: for example, an A4 page (8.27 × 11.69 inches) at 300 DPI — the standard resolution for printing — gives about 2480 × 3508 pixels, while at 72 DPI (a typical resolution for basic screen display), it's only 595 × 842 pixels.
Why isn't the A4 format used in the United States?
The United States (along with Canada and a few other countries) historically uses the imperial system and has kept paper sizes based on dimensions in inches (US Letter: 8.5 × 11 inches) rather than adopting the ISO 216 standard used by almost the entire rest of the world.
This reference is static and the DPI converter runs entirely in your browser, with no network calls.