Overview
What Is a Paper Size Converter?
This tool shows the dimensions of common paper sizes in both millimeters and inches for reference and comparison.
Convert between A4, Letter, and other paper sizes.
This tool shows the dimensions of common paper sizes in both millimeters and inches for reference and comparison.
Useful for understanding paper size dimensions when working across different regional standards.
Choose from common standard sizes.
Both metric and imperial dimensions display automatically.
A4 is 210x297mm (used internationally); Letter is 8.5x11 inches (used primarily in the US and Canada) - they have different proportions.
A standardized international system (A0 through A10) where each size is exactly half the area of the previous size, maintaining the same aspect ratio.
Approximately 8.27 x 11.69 inches.
Approximately 215.9 x 279.4mm.
Most of the world uses A4; the US, Canada, and a few other countries primarily use Letter and Legal sizes.
No, this tool works entirely in your browser.
A US paper size, 8.5 x 14 inches, longer than standard Letter, often used for legal documents.
Yes, A3 has exactly double the area of A4, maintaining the same aspect ratio.
Yes, understanding size differences helps when preparing documents for printing in different regions.
Yes, completely free with no sign-up required.