What Is a PDF Dimension Checker?
A PDF Dimension Checker reads the page dimensions stored inside a PDF and shows the width and height of each page. It helps you confirm the physical size of a document without printing it.
A PDF may use a standard format such as A4, A3, A5, Letter or Legal. It can also use a custom page size. A document created by combining several files may contain more than one page size.
How to Check PDF Dimensions Online
- Select your PDF. Drag the PDF into the upload area or click Select PDF File.
- Start the check. Click Check PDF Dimensions.
- Wait for analysis. The tool checks the page geometry.
- Review the summary. Check width, height, orientation and page count.
- Review every page. Use the detailed table to compare dimensions.
Check PDF Size in MM
If you need to check PDF size in mm, the millimeter measurement shows the page width and height using metric units. This is useful for ISO paper sizes such as A4, A3 and A5.
An A4 page measures 210 × 297 mm in portrait orientation. Landscape A4 reverses the width and height.
Check PDF Size in CM
You can also check PDF size in cm. One centimeter equals 10 millimeters, so an A4 page measures 21 × 29.7 cm.
PDF Dimensions in Inches
Inches are commonly used for US paper standards. US Letter measures 8.5 × 11 inches, while Legal measures 8.5 × 14 inches.
PDF Dimensions in Points
PDF page geometry is commonly represented using points. One inch equals 72 points. A US Letter page is commonly represented as 612 × 792 points.
A4 is approximately 595.28 × 841.89 points.
Can a PDF Have Different Page Sizes?
Yes. A single PDF can contain pages with different dimensions. One page may be A4, another Letter and another a custom size.
- Different pages may require different paper sizes.
- Printing can produce unexpected scaling.
- Margins may look different from page to page.
- Submission systems may have page-size rules.
- Combined documents may look inconsistent.
Portrait and Landscape PDF Dimensions
Portrait
The page height is greater than its width. A typical portrait A4 page is 210 × 297 mm.
Landscape
The page width is greater than its height. A landscape A4 page is 297 × 210 mm.
PDF Dimensions vs PDF File Size
| Property | Meaning | Example |
|---|---|---|
| PDF Dimensions | Width and height of a page | 210 × 297 mm |
| PDF File Size | Digital storage used by the file | 4.5 MB |
| Page Count | Number of pages | 20 pages |
Common PDF Paper Sizes
| Paper Size | Width | Height | Inches |
|---|---|---|---|
| A4 | 210 mm | 297 mm | 8.27 × 11.69 in |
| A3 | 297 mm | 420 mm | 11.69 × 16.54 in |
| A5 | 148 mm | 210 mm | 5.83 × 8.27 in |
| Letter | 215.9 mm | 279.4 mm | 8.5 × 11 in |
| Legal | 215.9 mm | 355.6 mm | 8.5 × 14 in |
| Tabloid | 279.4 mm | 431.8 mm | 11 × 17 in |
When Should You Check PDF Dimensions?
- Before printing a document.
- Before submitting an application.
- Before sending a file to a print shop.
- Before combining PDF files.
- Before uploading a document to a portal.
- When pages appear to have different sizes.
- When printed pages have unexpected scaling.
PDF Dimension Checker FAQs
What is a PDF Dimension Checker?
A PDF Dimension Checker reads the page geometry of a PDF and reports its width, height and orientation.
How do I check PDF dimensions online?
Upload your PDF above and click Check PDF Dimensions. The results show the measurements and page-by-page dimensions.
How do I check PDF size in mm?
Upload the PDF and review the Millimeters result. It shows the width and height of each page in mm.
How do I check PDF size in cm?
Upload the PDF and review the Centimeters result. Ten millimeters equals one centimeter.
What are A4 PDF dimensions?
A4 measures 210 × 297 mm, approximately 21 × 29.7 cm or 8.27 × 11.69 inches.
What are US Letter PDF dimensions?
US Letter measures 8.5 × 11 inches, or approximately 215.9 × 279.4 mm.
Can a PDF contain different page sizes?
Yes. Different pages in one PDF can have different widths, heights and orientations.
Are PDF dimensions the same as PDF file size?
No. PDF dimensions describe page width and height. File size describes digital storage.
Other PDF Inspection Tools
- PDF Page Size Checker for exact page width and height.
- PDF A4 Checker for checking A4 compatibility.
- PDF Letter Checker for checking US Letter pages.
- PDF Page Orientation Checker for portrait and landscape information.
- PDF Mixed Size Checker for finding different page sizes.
- PDF Page Count for checking the total number of pages.
- PDF Page Box Inspector for checking PDF page boundaries.
Knowing the exact dimensions of a PDF page can help prevent printing, formatting and submission problems. A PDF may look correct on screen while using A4, Letter, Legal or a custom page size.
The PDF Dimension Checker shows the actual width and height of PDF pages and lets you compare the measurements in millimeters, centimeters, inches and points.