Check Your PDF Page Size

Enter the PDF page dimensions shown in your software (usually in points or pixels) and this tool will identify the closest standard paper size.

📑 Identify PDF Page Size

Closest Standard Size
A4
210 × 297 mm • 595 × 842 points

🔍 How to Check PDF Size in Your Software

  1. Adobe Acrobat Reader: File → Properties → Description tab → Page Size
  2. Adobe Acrobat Pro: File → Properties → Description → Page Size
  3. Preview (Mac): Tools → Show Inspector → Page Info
  4. PDF24 (free): Open PDF → File → Document Properties
  5. Windows Explorer: Right-click PDF → Properties → Details tab

📏 PDF Points Reference

PDF files use points as their internal unit — 72 points per inch. Here's a conversion table for common paper sizes:

Paper SizePoints (PDF)mm
A4595 × 842 pts210 × 297 mm
A3842 × 1191 pts297 × 420 mm
A5420 × 595 pts148 × 210 mm
A21191 × 1684 pts420 × 594 mm
A11684 × 2384 pts594 × 841 mm
A02384 × 3370 pts841 × 1189 mm
US Letter612 × 792 pts216 × 279 mm
US Legal612 × 1008 pts216 × 356 mm
US Tabloid792 × 1224 pts279 × 432 mm

🔧 How to Change PDF Page Size

  • Option 1 — Adobe Acrobat: File → Print → Change paper size → Print to PDF
  • Option 2 — Free online tools: Use PDF24, SmallPDF, or ILovePDF to resize
  • Option 3 — Source document: Change page size in Word, InDesign, or original software and re-export
  • Option 4 — Photoshop/GIMP: Rasterise, resize canvas, then re-save as PDF

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