Reference library
A4 Paper Size in Pixels, Millimeters, Centimeters and Inches
A4 paper size is 210 x 297 mm, 21.0 x 29.7 cm, or 8.27 x 11.69 in. Get A4 pixel sizes by DPI, bleed setup, formulas, and calculators.
Last checked: 2026-05-01
How we calculate this
Methodology and source handling
We convert physical sizes to inches, multiply by the selected DPI/PPI value, and round to whole pixels.
Quick answer
Copy-ready answer
A4 paper measures 210 x 297 mm, 21.0 x 29.7 cm, or 8.27 x 11.69 in. At 300 DPI, A4 is 2480 x 3508 px.
Dimensions and specs
| Millimeters | 210 x 297 mm | |
|---|---|---|
| Centimeters | 21 x 29.7 cm | |
| Inches | 8.27 x 11.69 in | |
| 300 DPI pixels | 2480 x 3508 px |
Pixels
Pixel dimensions by DPI
| DPI / PPI | Width | Height | Use |
|---|---|---|---|
| 72 DPI | 595 px | 842 px | Screen or draft reference density |
| 96 DPI | 794 px | 1123 px | Screen or draft reference density |
| 150 DPI | 1240 px | 1754 px | Screen or draft reference density |
| 300 DPI | 2480 px | 3508 px | Common high-quality print setup |
| 600 DPI | 4961 px | 7016 px | High-resolution archival or print workflow |
Formula
How to calculate this size
210 mm x 300 PPI = 2,480 px wide.
Use this when the artwork stops at the finished edge.
Add 3 mm per side before calculating pixels when artwork reaches the edge.
Common mistakes
Avoid these a4 paper size in pixels, millimeters, centimeters and inches problems
A paper size needs a PPI target before pixels mean anything for print.
Portrait and landscape use the same dimensions, but width and height swap in the export.
Paper pages show trim size first; add bleed only when the design prints to the edge.
Calculator
Calculate pixels and bleed
Enter any DPI to calculate the pixel dimensions for this physical size.
Compare
Compare A4 Paper Size in Pixels, Millimeters, Centimeters and Inches
Open a curated comparison or send both sizes into the compare tool with a fragment URL.
- A4 Paper Size in Pixels, Millimeters, Centimeters and Inches
- 210 x 297 mm
- A3
- 297 x 420 mm
- A4 Paper Size in Pixels, Millimeters, Centimeters and Inches
- 210 x 297 mm
- A5
- 148 x 210 mm
- A4 Paper Size in Pixels, Millimeters, Centimeters and Inches
- 210 x 297 mm
- US Letter
- 215.9 x 279.4 mm
Workflow
Use A4 Paper Size in Pixels, Millimeters, Centimeters and Inches in a finished file
Copy the millimeter, centimeter, or inch dimensions for the selected paper standard.
Use 300 PPI for most sharp print exports, or match the printer requirement.
Multiply inches by PPI, then add bleed only when artwork reaches the trimmed edge.
Related
Related pages and tools
Same branch
Nearby pages
FAQ
Common questions
What is the exact A4 paper size?
A4 paper measures 210 x 297 millimeters, 21.0 x 29.7 centimeters, or approximately 8.27 x 11.69 inches.
What is A4 size in pixels at 300 DPI?
A4 at 300 DPI is 2480 x 3508 pixels when rounded to the nearest whole pixel. This is the common high-quality print setup.
Is A4 the same size as US Letter?
No. A4 is 210 x 297 mm, while US Letter is 8.5 x 11 inches, or 215.9 x 279.4 mm. A4 is slightly narrower and taller than US Letter.
How much bleed should I add to an A4 design?
A common commercial print setup is 3 mm bleed on each side. For A4, that makes the document 216 x 303 mm before trimming. Always confirm the exact bleed requirement with your printer.
How do I calculate A4 pixels for any DPI?
Convert millimeters to inches, then multiply by DPI. Width pixels = 210 / 25.4 x DPI and height pixels = 297 / 25.4 x DPI, rounded to whole pixels.
References
Sources and references
ISO 216 physical dimensions. Pixel values are calculated from millimeters / 25.4 x DPI and rounded to whole pixels.
-
ISO 216:2007
Used for ISO A and B series physical paper dimensions.
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W3C CSS Values and Units Module
Used for CSS unit definitions, absolute unit relationships, and CSS px behavior.
Last checked: 2026-05-01