Preflight a print PDF
Confirm the exported document uses the intended trim dimensions before submitting it.
Private PDF page-size checker
Check PDF page sizes without uploading the file.
Read every page’s dimensions, orientation and closest standard paper size, and spot mixed-size documents before sending them to print.
Instant resultsNo signupRuns in your browser
Local PDF inspection
Choose a PDF to check
Choose a PDF to read its page dimensions.
No upload. No account.The PDF is parsed in your browser and never sent to ReadyForPrint.
When to use it
Start with the result you need
This calculator is most useful when one part of the print specification is known and another needs to be checked.
Find mixed page sizes
Spot a stray Letter page inside an A4 document or a rotated page in a multi-page file.
Identify an unknown file
Read the physical dimensions when the filename or document properties are unclear.
The calculation
How it works
PDF page dimensions are stored in points. The checker converts them using 72 points = 1 inch and 25.4 mm = 1 inch.
Standard names are matched with a small tolerance because applications can round page boxes slightly. Rotation is included when reporting portrait or landscape dimensions.
Quick reference
Common PDF page dimensions
The checker reports the actual page box. Bleed may make a production PDF larger than its final trim size.
| Page size | Millimetres | Inches |
|---|---|---|
| A5 | 148 × 210 mm | 5.83 × 8.27 in |
| A4 | 210 × 297 mm | 8.27 × 11.69 in |
| A3 | 297 × 420 mm | 11.69 × 16.54 in |
| Letter | 215.9 × 279.4 mm | 8.5 × 11 in |
| Legal | 215.9 × 355.6 mm | 8.5 × 14 in |
| Tabloid | 279.4 × 431.8 mm | 11 × 17 in |
Check the numbers
A4 document
A page near 595 × 842 points converts to approximately 210 × 297 mm and is identified as A4 portrait.
US Letter landscape
A rotated 11 × 8.5 inch page is reported as Letter landscape.
A4 plus 3 mm bleed
The exported page can measure 216 × 303 mm. That is larger than A4 because bleed extends beyond the trim edge.
Before you export
Common mistakes to avoid
Treating page size as trim size
A print-ready PDF with bleed can be larger than the final product. Check trim marks or the printer specification.
Checking only page one
Long documents can contain accidental mixed sizes, so review the full page table.
Assuming orientation fixes content
The page box can be correct while artwork is rotated or positioned incorrectly. Inspect the visual PDF separately.
Check PDF page sizes without uploading the file. FAQ
Is my PDF uploaded?
No. The document is parsed locally in your browser and is not sent to ReadyForPrint.
Why is my A4 PDF larger than A4?
It may include bleed. A4 with 3 mm bleed on every side is 216 × 303 mm.
Can the checker open password-protected PDFs?
No. Encrypted or password-protected documents must be unlocked before the browser can inspect their page sizes.
Reviewed for accuracy: 28 July 2026