A4 pixels
How many pixels is A4?
A4 is 210 × 297 mm. At 300 DPI, portrait is about 2480 × 3508 px; at 72 DPI it is 595 × 842 px.
Chart
A4 pixels at common DPI
Click a row to load the calculator. Pixels = mm ÷ 25.4 × DPI (rounded).
| DPI | Portrait pixels (px) | Approx. total | Typical use | Action |
|---|---|---|---|---|
| 0.50 MP | Screen preview only, not fit for fine print | |||
| 0.89 MP | Common screen and office preview | |||
| 2.17 MP | Distance viewing, drafts, or some large formats | |||
| 3.87 MP | A middle-ground precision for general print | |||
| 8.70 MP | Common delivery value for close reading | |||
| 11.85 MP | Some high-precision output requirements | |||
| 34.81 MP | Line art and high-precision output; large files |
Click a DPI or pixel row to load the calculator above; copy W × H px on the right.
Dimensions
A4 size in mm, cm, inches, points and pixels
A4 is defined by ISO 216 as 210 × 297 mm. Everything else on this page is that same physical size written in another unit.
| Unit | Portrait (W × H) | Landscape (W × H) | Note |
|---|---|---|---|
| Millimetres | 210 × 297 mm | 297 × 210 mm | ISO 216 definition |
| Centimetres | 21.0 × 29.7 cm | 29.7 × 21.0 cm | Same size, ÷ 10 |
| Inches | 8.27 × 11.69 in | 11.69 × 8.27 in | mm ÷ 25.4 |
| Points (PDF) | 595 × 842 pt | 842 × 595 pt | 72 pt per inch; exactly 595.28 × 841.89 |
| Pixels at 72 DPI | 595 × 842 px | 842 × 595 px | Same numbers as points; many design tools default here |
| CSS pixels (96 DPI) | 794 × 1123 px | 1123 × 794 px | What a browser uses for 210 × 297 mm |
| Pixels at 300 DPI | 2480 × 3508 px | 3508 × 2480 px | The usual target for print |
Why A4 has no single pixel size
A4 is a physical size, so its pixel count depends on the resolution you choose. Pixels = millimetres ÷ 25.4 × DPI. DPI (dots per inch) is how many pixels are laid across one inch of paper.
That is why you see different answers: 595 × 842 is A4 at 72 DPI (a PDF page in points, and the default of many design tools), 794 × 1123 is A4 at 96 DPI (what a browser draws for 210 × 297 mm), and 2480 × 3508 is A4 at 300 DPI, the usual print target.
Pick the DPI from the end use, not from the paper. A screen mock-up needs 96 DPI or less. Text documents print cleanly at 150–200 DPI. Photos, brochures and posters should be 300 DPI. Line art and archival scans can go to 600 DPI at the cost of much larger files.
Other sizes
Paper sizes in pixels: A0–A7, Letter and Legal
The same formula for every common paper size. Values are portrait width × height, rounded to whole pixels.
| Paper | Millimetres | 72 DPI | 96 DPI | 150 DPI | 300 DPI |
|---|---|---|---|---|---|
| A0 | 841 × 1189 | 2,384 × 3,370 | 3,179 × 4,494 | 4,967 × 7,022 | 9,933 × 14,043 |
| A1 | 594 × 841 | 1,684 × 2,384 | 2,245 × 3,179 | 3,508 × 4,967 | 7,016 × 9,933 |
| A2 | 420 × 594 | 1,191 × 1,684 | 1,587 × 2,245 | 2,480 × 3,508 | 4,961 × 7,016 |
| A3 | 297 × 420 | 842 × 1,191 | 1,123 × 1,587 | 1,754 × 2,480 | 3,508 × 4,961 |
| A4 | 210 × 297 | 595 × 842 | 794 × 1,123 | 1,240 × 1,754 | 2,480 × 3,508 |
| A5 | 148 × 210 | 420 × 595 | 559 × 794 | 874 × 1,240 | 1,748 × 2,480 |
| A6 | 105 × 148 | 298 × 420 | 397 × 559 | 620 × 874 | 1,240 × 1,748 |
| A7 | 74 × 105 | 210 × 298 | 280 × 397 | 437 × 620 | 874 × 1,240 |
| Letter | 215.9 × 279.4 | 612 × 792 | 816 × 1,056 | 1,275 × 1,650 | 2,550 × 3,300 |
| Legal | 215.9 × 355.6 | 612 × 1,008 | 816 × 1,344 | 1,275 × 2,100 | 2,550 × 4,200 |
Set A4 in common tools
Enter the physical size and resolution when you can; use pixels only when a tool has no DPI setting.
Photoshop and GIMP. New document → width 210 mm, height 297 mm, resolution 300 pixels/inch. The canvas comes out at 2480 × 3508 px.
Word and Google Docs. Set the page size to A4 (210 × 297 mm). For a full-page picture, supply 2480 × 3508 px (300 DPI), or 1654 × 2339 px (200 DPI) if file size matters.
Figma, Sketch and other screen tools. These work in pixels with no DPI. Draw a 595 × 842 frame for a point-based A4, then export at 4.17× (300 ÷ 72) to get about 2480 × 3508 px.
HTML and CSS print. Let the browser handle it: set the page to A4 and size the sheet in millimetres. In CSS, 210 mm is about 794 px at 96 DPI.
CSS for an A4 print page
@page { size: A4; margin: 0; }
.sheet { width: 210mm; height: 297mm; }Millimetres keep the sheet the right physical size whatever the screen resolution.
FAQ
Notes
How many pixels is A4?
It depends on the DPI. Portrait A4 is 595 × 842 px at 72 DPI, 794 × 1123 px at 96 DPI, 1240 × 1754 px at 150 DPI, 2480 × 3508 px at 300 DPI and 4961 × 7016 px at 600 DPI.
Why do I see both 595 × 842 and 794 × 1123 for A4?
They are the same sheet at different resolutions: 595 × 842 is 72 DPI (PDF points) and 794 × 1123 is 96 DPI (CSS pixels).
What size should an image be to fill an A4 page?
Use 2480 × 3508 px for 300 DPI print. 1654 × 2339 px (200 DPI) is usually fine for photos viewed at arm's length; below about 150 DPI (1240 × 1754 px) fine detail looks soft.
Is A4 the same size as US Letter?
No. Letter is 8.5 × 11 in (215.9 × 279.4 mm), or 2550 × 3300 px at 300 DPI. A4 is slightly narrower and taller at 8.27 × 11.69 in.
What is the aspect ratio of A4?
1 : √2, about 1 : 1.414 (297 ÷ 210). Folding an A-series sheet in half across its long side gives the next size down with the same ratio, so A3 is exactly two A4 sheets.
Landscape at 300 DPI?
About 3508 × 2480 px (swap width/height).
Must a PDF be 2480 × 3508?
Not for vector text. Only full-page bitmaps need that pixel count.
With 3 mm bleed?
File 216 × 303 mm; ~2551 × 3579 px at 300 DPI. Follow the printer template.