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A4 Size in Pixels and Other Paper Sizes at Every DPI
If you need A4 size in pixels, it is 2480 x 3508 at 300 DPI, 1240 x 1754 at 150 DPI, and 794 x 1123 at 96 DPI. This guide also covers Letter, A3, A5, and more.
Overview
If you need A4 size in pixels, it is 2480 x 3508 at 300 DPI, 1240 x 1754 at 150 DPI, and 794 x 1123 at 96 DPI. This guide also covers Letter, A3, A5, and more.
ISO A Series Paper Sizes
The ISO 216 standard defines the A series of paper sizes used worldwide. Each size is derived by halving the next larger size along its longer dimension. All values below are in pixels (width × height).
| Size | mm | Inches | 72 DPI | 96 DPI | 150 DPI | 300 DPI |
|---|---|---|---|---|---|---|
| A3 | 297 × 420 | 11.69 × 16.54 | 842 × 1191 | 1123 × 1588 | 1754 × 2480 | 3508 × 4961 |
| A4 | 210 × 297 | 8.27 × 11.69 | 595 × 842 | 794 × 1123 | 1240 × 1754 | 2480 × 3508 |
| A5 | 148 × 210 | 5.83 × 8.27 | 420 × 595 | 560 × 794 | 874 × 1240 | 1748 × 2480 |
| A6 | 105 × 148 | 4.13 × 5.83 | 298 × 420 | 397 × 560 | 620 × 874 | 1240 × 1748 |
| A2 | 420 × 594 | 16.54 × 23.39 | 1191 × 1684 | 1588 × 2245 | 2480 × 3508 | 4961 × 7016 |
| A1 | 594 × 841 | 23.39 × 33.11 | 1684 × 2384 | 2245 × 3179 | 3508 × 4967 | 7016 × 9933 |
| A0 | 841 × 1189 | 33.11 × 46.81 | 2384 × 3370 | 3179 × 4494 | 4967 × 7022 | 9933 × 14043 |
US Paper Sizes
| Size | Inches | 72 DPI | 96 DPI | 150 DPI | 300 DPI |
|---|---|---|---|---|---|
| Letter | 8.5 × 11 | 612 × 792 | 816 × 1056 | 1275 × 1650 | 2550 × 3300 |
| Legal | 8.5 × 14 | 612 × 1008 | 816 × 1344 | 1275 × 2100 | 2550 × 4200 |
| Tabloid | 11 × 17 | 792 × 1224 | 1056 × 1632 | 1650 × 2550 | 3300 × 5100 |
| Executive | 7.25 × 10.5 | 522 × 756 | 696 × 1008 | 1088 × 1575 | 2175 × 3150 |
How to Calculate Paper Size in Pixels
The formula is simple: pixels = inches × DPI. For metric measurements, first convert millimeters to inches by dividing by 25.4, then multiply by DPI.
For example, A4 width: 210 mm / 25.4 = 8.27 inches × 300 DPI = 2480 pixels.
Use our Image Size Calculator for quick conversions, or browse our Inches to Pixels converter for custom dimensions.
Setting Up Paper Size Documents in Design Software
Most design applications include preset paper sizes. Knowing the underlying pixel dimensions helps you avoid resolution problems when switching between applications or sending files to print.
In Photoshop: File > New. Choose a preset (A4, Letter, etc.) from the panel, then set Resolution to 300 pixels/inch. Photoshop automatically calculates the correct pixel canvas dimensions.
In Illustrator: New Document > Print category. Select A4, Letter, or any other preset. Illustrator uses 72 points per inch internally but the artboard matches your paper dimensions accurately.
In Canva: search for 'A4' or 'Letter' when creating a new design. Canva sets proportional canvas dimensions. Export as Print PDF with bleeds enabled for professional print output.
In InDesign: File > New Document. Select page size from the preset dropdown. InDesign is purpose-built for print production and handles DPI, bleed zones, and margins natively without manual calculation.
Print Bleed and Safety Margins in Pixels
Professional printing requires adding bleed and maintaining safety margins. Bleed is extra content beyond the trim edge that prevents white gaps after cutting. Safety margins keep important elements away from the trim zone.
Standard bleed is 3 mm (0.118 inches) on each side. At 300 DPI, that adds 35 pixels per edge. For A4 at 300 DPI (2480 x 3508 px), the full canvas with bleed becomes 2550 x 3578 pixels.
Safety margins are typically 3 to 5 mm inside the trim edge. Keep text, logos, and key graphics within this inner safe zone. At 300 DPI, a 5 mm margin equals about 59 pixels from each edge.
| Paper Size | 300 DPI (trim size) | With 3mm Bleed (300 DPI) |
|---|---|---|
| A4 | 2480 x 3508 px | 2550 x 3578 px |
| A5 | 1748 x 2480 px | 1819 x 2550 px |
| US Letter | 2550 x 3300 px | 2621 x 3371 px |
| A3 | 3508 x 4961 px | 3579 x 5031 px |
| US Legal | 2550 x 4200 px | 2621 x 4271 px |
Practical Quality Notes for A4 Size in Pixels and Other Paper Sizes at Every DPI
This guide is most helpful when the result is tied to a real workflow, not treated as a loose number. For A4 Size in Pixels and Other Paper Sizes at Every DPI, verify the target output size, image pixel dimensions, aspect ratio, compression level, and intended viewing distance. That context prevents the common mistake of copying a pixel value into a print, web, or CSS workflow where the reference size is different.
A4 Size in Pixels and Other Paper Sizes at Every DPI should be checked with the formula, a realistic example, and the actual output requirement before you export or publish. If the number looks unexpectedly large or small, check the unit direction first, then check the DPI, base font size, viewport width, or physical measurement that controls the calculation.
A good review pass for A4 Size in Pixels and Other Paper Sizes at Every DPI is simple: calculate once, compare against a known example, and preview the final output at the size people will actually see. If you need A4 size in pixels, it is 2480 x 3508 at 300 DPI, 1240 x 1754 at 150 DPI, and 794 x 1123 at 96 DPI. This guide also covers Letter, A3, A5, and more.
Checks Before You Use the Result
- Confirm that A4 Size in Pixels and Other Paper Sizes at Every DPI is using the same input unit your source file or design brief uses.
- Save the DPI, viewport, or font-size setting next to the final A4 Size in Pixels and Other Paper Sizes at Every DPI value so another person can reproduce it.
- Preview the A4 Size in Pixels and Other Paper Sizes at Every DPI output on the target medium before sending it to print, publishing it, or adding it to CSS.
- Recalculate A4 Size in Pixels and Other Paper Sizes at Every DPI after resizing, cropping, changing aspect ratio, or changing the root font-size or viewport assumption.
When the Number Needs a Second Look
Recheck the result if the project moves from screen to print, from desktop to mobile, from one social platform placement to another, or from a draft export to a production file. Small context changes can make a correct A4 Size in Pixels and Other Paper Sizes at Every DPI answer wrong for the final job.
Sources
Reference Sources
These external references support the page's conversion formulas, resolution guidance, and unit explanations.
w3.org
W3C: CSS Values and Units Module Level 4
Specification covering absolute lengths and resolution units such as px, in, cm, mm, pt, and dpi.
Visit source
developer.mozilla.org
MDN: CSS values and units
Reference guide for CSS measurement units and how browsers interpret physical and relative sizes.
Visit source
developer.mozilla.org
MDN: <resolution>
Reference for resolution units including dpi, dppx, and dpcm used in screen and print discussions.
Visit source
developer.mozilla.org
MDN: image-resolution
Explains how raster image resolution metadata interacts with CSS and print-oriented image workflows.
Visit source
Frequently Asked Questions
A4 paper (210 x 297 mm or 8.27 x 11.69 inches) at 300 DPI is 2480 x 3508 pixels. This is the standard resolution for professional print-quality A4 documents.
US Letter (8.5 x 11 inches) at 300 DPI is 2550 x 3300 pixels. This is the standard for print-ready documents in North America.
Use 300 DPI for professional printing, 150 DPI for draft prints and home use, 96 DPI for screen mockups, and 72 DPI for web-only documents.
A3 (297 x 420 mm) at 300 DPI is 3508 x 4961 pixels. At 150 DPI, it is 1754 x 2480 pixels. At 72 DPI, it is 842 x 1191 pixels.