A4 Size in Pixels, mm and Inches
A4 is 210 × 297 mm (8.27 × 11.69 in). Get A4 in pixels at any DPI — 2480 × 3508 at 300 DPI — in points, and the printable area after margins.
| Resolution | Pixels | Megapixels |
|---|---|---|
| 72 DPI | 595 × 842 | 0.5 MP |
| 96 DPI | 794 × 1123 | 0.9 MP |
| 150 DPI | 1240 × 1754 | 2.2 MP |
| 200 DPI | 1654 × 2339 | 3.9 MP |
| 300 DPI | 2480 × 3508 | 8.7 MP |
| 600 DPI | 4961 × 7016 | 34.8 MP |
| Paper | mm | inches | pixels |
|---|---|---|---|
| A3 | 297 × 420 | 11.69 × 16.54 | 3508 × 4961 |
| A4 | 210 × 297 | 8.27 × 11.69 | 2480 × 3508 |
| A5 | 148 × 210 | 5.83 × 8.27 | 1748 × 2480 |
| US Letter | 215.9 × 279.4 | 8.5 × 11 | 2550 × 3300 |
| US Legal | 215.9 × 355.6 | 8.5 × 14 | 2550 × 4200 |
A4 measures 210 × 297 mm (21 × 29.7 cm, 8.27 × 11.69 inches) and is the standard sheet for letters, forms and printing in almost every country outside North America. Screens and image editors think in pixels, so the pixel size depends on the resolution: this tool converts A4 at any DPI and shows the area left inside your margins.
How to use this tool
- Choose the resolution you will print or export at (300 DPI is the print standard).
- Pick portrait or landscape.
- Enter your page margin to get the printable area.
- Use the pixel size for a new canvas in Photoshop, Canva, GIMP or Figma.
Formula
pixels = round(mm ÷ 25.4 × DPI) · points = mm ÷ 25.4 × 72
25.4 mm is exactly one inch. A4 comes from ISO 216: A0 is 1 m² with sides 1:√2, and A4 is A0 halved four times.
Example
At 300 DPI: 210 ÷ 25.4 = 8.268 in × 300 = 2480.3 → 2480 px wide, and 297 ÷ 25.4 = 11.693 in × 300 = 3507.9 → 3508 px tall. With 20 mm margins the printable area is 170 × 257 mm, or 2008 × 3035 px.
Frequently asked questions
What size is A4 in pixels for a website or screen?
At the CSS reference of 96 pixels per inch, A4 is 794 × 1123 px. Browsers use this when you print a page to A4.
Why do some sites say 2480 × 3508 and others 2481 × 3508?
210 mm at 300 DPI is 2480.3 px, which rounds to 2480. Some programs round up to avoid losing a fraction of a pixel; the difference is invisible in print.
Is A4 bigger than Letter?
A4 is 18 mm taller but 6 mm narrower than US Letter (215.9 × 279.4 mm), so neither fully contains the other.
Sources
Last updated:
Page address with these inputs: https://kakao.mobile/tools/a4-size-tool/
Cite or embed this tool
kakaoCalc. (2026, November 8). A4 Size in Pixels, mm and Inches. https://kakao.mobile/tools/a4-size-tool/
“A4 Size in Pixels, mm and Inches.” kakaoCalc, 8 Nov. 2026, kakao.mobile/tools/a4-size-tool/.
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