Paper Size Converter

Paper Size Converter helps you understand and convert between standard paper sizes used around the world. The A-series (A0, A1, A2, A3, A4, A5, etc.) is the international standard used in most countries, while the B-series offers larger sheets for special purposes. North America, Mexico, and a few other regions use Letter, Legal, and Tabloid formats instead. This tool eliminates confusion when working across different regions or printing standards.

Select a paper size from the dropdown menu and instantly view its dimensions in millimeters, centimeters, and inches. You can also enter custom dimensions and find the nearest standard paper size. This is especially helpful when preparing documents for international distribution, checking printer specifications, or understanding architectural and technical drawing requirements.

The standard A4 sheet, used globally for everyday printing and office work, measures 210 × 297 mm. A3 is double the area of A4, while A5 is half. Each step down in the A-series halves the area by folding the longer edge in half. Understanding these relationships helps when resizing documents and ensures your layouts adapt correctly across different paper formats.