A4 Paper Size, Dimensions and Format (A series)

A4 in millimeters

210 x 297




Aspect ratio 1:1.41
Area (A) 62,370 mm²
Perimeter (P) 1,014 mm
Diagonal (d) 363.74 mm


The A4 format measures 210 x 297 mm or 8.3 x 11.7 inches. An A4 paper fromat has an aspect ratio of 1:1.41. The Area of the A4 paper size is 62,370 mm² or 97.11 in² with a perimeter of 1,014 mm or 40 in. An A4 format has a diagonal length of 363.74 mm or 14.35 in. The A4 size belongs to the A series. In the A series there are a total of 19 paper sizes.

Frequently Asked Questions:

The size of an A4 paper is 210 x 297 mm

The size of an A4 paper in inches is 8.3 x 11.7 in

The half size of an A4 paper is 105 x 148.5 mm or 4.15 x 5.85 in

The aspect ratio of an A4 is 1:1.41

The area of an A4 paper is 62,370 mm or 97.11 in

The perimeter of an A4 paper is 1,014 mm or 40 in

The diagonal measurement of A4 paper is 363.74 mm or 14.35 in

Other A Paper Sizes

There are a total of 19 A Paper Sizes.