The A4 size is one of the most commonly used paper sizes in the world. It’s a standard for documents, printing, and stationery, making it essential for students, professionals, and creatives. If you’re wondering about the exact dimensions of A4 size in various units like inches, centimeters (cm), millimeters (mm), and pixels, this guide has you covered. Let’s dive into the details and explore everything you need to know about A4 size, including its uses, history, and tips for working with it in different formats.
A4 is part of the ISO 216 standard for paper sizes, which is widely used across the globe, especially in Europe, Asia, and Africa. The ISO 216 standard is based on a consistent aspect ratio of √2:1, which means that when you fold the paper in half, it maintains the same proportions. This unique characteristic makes A4 size ideal for various applications, including printing, copying, and designing.
In the United States and Canada, “Letter” size (8.5 x 11 inches) is more common, but A4 size dominates in most other regions.
A4 Size Dimensions in Different Units
Understanding the dimensions of A4 size paper is crucial for setting up documents, designing layouts, or printing. Here are the exact dimensions of A4 size in various units:
In millimeters: 210 mm x 297 mm
In centimeters: 21.0 cm x 29.7 cm
In inches: 8.27 inches x 11.69 inches
In pixels
72 DPI: 595 x 842 pixels
96 DPI: 794 x 1123 pixels
150 DPI: 1240 x 1754 pixels
300 DPI: 2480 x 3508 pixels
Higher resolutions like 300 DPI are ideal for high-quality printing, while lower resolutions work well for digital sharing or viewing.
Skip to content 
