PDF Page Size Guide
A quick reference for common document page sizes, plus an optional tool to resize an existing PDF to one of them.
| Size | Millimeters | Points |
|---|---|---|
| A4 | 210 × 297 mm | 595 × 842 pt |
| A3 | 297 × 420 mm | 842 × 1191 pt |
| A5 | 148 × 210 mm | 420 × 595 pt |
| Letter | 215.9 × 279.4 mm | 612 × 792 pt |
| Legal | 215.9 × 355.6 mm | 612 × 1008 pt |
Resize a PDF to one of these sizes
This scales each page's content to fit the new page size — it doesn't re-flow text.
Drop a PDF here
or choose a PDF from your device
Up to 50MB
How to resize a PDF to a standard page size
- 1Check the reference table for the size you need.
- 2Upload the PDF you want to resize.
- 3Choose a page size and orientation.
- 4Select Resize PDF and download the result.
Frequently asked questions
What's the difference between A4 and Letter?
A4 (210 × 297mm) is used in most of the world, while Letter (215.9 × 279.4mm) is standard in the United States and Canada. A4 is slightly narrower and taller than Letter.
Does resizing change the content on each page?
Resizing scales each page's existing content to fit the new page size proportionally. It doesn't re-flow text like a word processor would — it treats each page as a fixed image-like layout.
Which size should I use for printing?
Use A4 if you're outside North America, or Letter if you're in the US or Canada, unless your printer or recipient specifies otherwise.