PdfRuler Blog
Guides on measuring PDFs, page sizes, units and print preparation. Page 5 of 5.
July 3, 2026 · 3 min readConvert mm to Points and Inches to Points (PDF Units Cheat Sheet)Convert millimetres, centimetres and inches to PDF points and back. Formulas, examples and a free online PDF ruler to read any PDF in your preferred unit.June 30, 2026 · 4 min readUS Letter vs A4: PDF Page Size Differences and How to Check YoursUS Letter is 215.9 x 279.4 mm and A4 is 210 x 297 mm. See the exact differences in mm, inches and points, and how to tell which one your PDF really uses.June 26, 2026 · 5 min readISO A-Series Paper Sizes (A0 to A10) in mm, Inches and PointsFull table of ISO A-series paper sizes from A0 to A10 in millimetres, inches and PDF points, plus how the halving rule works and how to check a PDF against it.June 23, 2026 · 4 min readHow to Find the Page Size of a PDF (Acrobat, Preview, Browser, Online)Four easy ways to find the page size of a PDF: Adobe Acrobat, Mac Preview, your browser and a free online PDF ruler. Get exact width and height in mm or inches.June 19, 2026 · 4 min readWhat Is a PDF Point (pt)? Convert Points to mm, Inches and PixelsA PDF point is 1/72 of an inch. Learn how to convert PDF points to millimetres, inches and pixels, with formulas and a quick conversion table.June 16, 2026 · 4 min readPDF Page Sizes: A4, Letter, Legal and More in mm, Inches and PointsComplete reference table of standard PDF page sizes (A0-A6, Letter, Legal, Tabloid) in millimetres, inches and PDF points. Check your PDF size in seconds.June 12, 2026 · 5 min readHow to Measure a PDF Online (mm, cm, inches) in 3 StepsLearn how to measure any PDF online in millimetres, centimetres or inches. Get exact page size and X/Y coordinates with a free PDF ruler, no upload needed.