# PDF Page Sizes and Dimensions: A4, Letter, Legal and More > This guide lists standard PDF page sizes in millimeters, inches, pixels at two resolutions and PDF points, with notes on each. - Page: https://acepdfmd.com/guides/pdf-page-sizes/ - Updated: 2026-09-14 - Runs at: https://acepdfmd.com (Uploaded files are deleted within 60 minutes. No signup for light use.) - Also in 29 languages: https://acepdfmd.com//guides/pdf-page-sizes/ ## The Standard Sizes Pixel counts are computed as inches times dpi, rounded to the nearest whole number. PDF points are fixed at 72 per inch regardless of any dpi setting. | Size | mm | inches | px at 72 dpi | px at 300 dpi | PDF points | | --- | --- | --- | --- | --- | --- | | A3 | 297 x 420 | 11.69 x 16.54 | 842 x 1191 | 3508 x 4961 | 842 x 1191 | | A4 | 210 x 297 | 8.27 x 11.69 | 595 x 842 | 2480 x 3508 | 595 x 842 | | A5 | 148 x 210 | 5.83 x 8.27 | 420 x 595 | 1748 x 2480 | 420 x 595 | | A6 | 105 x 148 | 4.13 x 5.83 | 298 x 420 | 1240 x 1748 | 298 x 420 | | B5 | 176 x 250 | 6.93 x 9.84 | 499 x 709 | 2079 x 2953 | 499 x 709 | | US Letter | 216 x 279 | 8.5 x 11 | 612 x 792 | 2550 x 3300 | 612 x 792 | | US Legal | 216 x 356 | 8.5 x 14 | 612 x 1008 | 2550 x 4200 | 612 x 1008 | | Tabloid | 279 x 432 | 11 x 17 | 792 x 1224 | 3300 x 5100 | 792 x 1224 | | Executive | 184 x 267 | 7.25 x 10.5 | 522 x 756 | 2175 x 3150 | 522 x 756 | ## Points vs Pixels vs DPI A PDF page is defined in points, a fixed physical unit, 72 to the inch. A pixel only exists once you rasterize the page for a screen or an image export, and the pixel count depends entirely on the dpi you choose. The same A4 page is 595 x 842 points whether you view it at 72 dpi or export it at 300 dpi; only the pixel dimensions of the exported image change. ## Why a PDF Has No Resolution Text and vector graphics in a PDF are drawn from mathematical outlines, not a pixel grid, so they scale to any size without becoming blurry. Only embedded raster images, such as scanned pages or photos, have a fixed pixel resolution. That is why a page can look sharp at any zoom level while a low-resolution photo inside it still looks soft. ## Bleed and Margins Print shops often ask for extra bleed, a margin of content that extends past the trim line so that any slight misalignment during cutting does not leave a white edge. A common bleed allowance is 3 to 5 mm on each side. Margins inside the trim line keep text away from the edge and away from any bleed area. ## Choosing a Size for Print vs Screen For paper documents, match the size your printer or print shop expects, A4 almost everywhere outside North America and US Letter within the United States and Canada. For on-screen reading, page size matters less than readable text width, since most viewers zoom to fit the screen anyway. ## Mixed Page Sizes in One PDF A single PDF file can contain pages of different sizes, which is legal and renders correctly in every standard viewer. This is common when combining a cover page, a landscape chart and a portrait report into one file. Some print workflows and older printers handle mixed sizes poorly, so check before sending a mixed-size file to a print shop. ## Working With Page Sizes Use [Resize PDF](https://acepdfmd.com/tool/resize-pdf/) to change a document to a standard size, [Crop PDF](https://acepdfmd.com/tool/crop/) to trim margins or unwanted edges, and [PDF to Image (HQ)](https://acepdfmd.com/tool/pdf-to-image-hq/) to export pages as high-resolution images at a chosen dpi. Going the other way, [Image to PDF](https://acepdfmd.com/tool/image-to-pdf/) places photos onto pages of a size you pick, and [Markdown to PDF](https://acepdfmd.com/tool/markdown-to-pdf/) lays out plain text documents onto A4 pages automatically. For more on file size and image quality inside a PDF, see the [PDF compression guide](https://acepdfmd.com/guides/pdf-compression-guide/). ## Tools mentioned in this guide - [Resize PDF](https://acepdfmd.com/tool/resize-pdf/): Rescale every page to a standard paper size. - [Crop PDF](https://acepdfmd.com/tool/crop/): Trim margins from pages. - [PDF to Image (HQ)](https://acepdfmd.com/tool/pdf-to-image-hq/): Export PDF pages as high-resolution PNG or JPG images. - [Image to PDF](https://acepdfmd.com/tool/image-to-pdf/): Combine multiple images into a single PDF file. - [Markdown to PDF](https://acepdfmd.com/tool/markdown-to-pdf/): Convert a .md file into a formatted PDF. ## More guides - [Markdown Cheat Sheet: Syntax Reference with Examples](https://acepdfmd.com/guides/markdown-cheat-sheet/) - [How PDF Compression Works and Why Some Files Barely Shrink](https://acepdfmd.com/guides/pdf-compression-guide/) - [PDF to Markdown: How It Works and How to Use It for AI](https://acepdfmd.com/guides/pdf-to-markdown-guide/) - [OCR for PDFs and Images: How to Get Accurate Text](https://acepdfmd.com/guides/ocr-guide/) - [Is It Safe to Upload a PDF Online? A Privacy Guide](https://acepdfmd.com/guides/privacy-guide/) - [Open and Convert iWork Files (Pages, Numbers, Keynote) Without a Mac](https://acepdfmd.com/guides/iwork-guide/) - [JSON Tools Guide: Convert Documents and Data to JSON and Back](https://acepdfmd.com/guides/json-guide/)