A5 Paper Size, Dimensions and Format (A series)

A5 in millimeters

148 x 210




Aspect ratio 1:1.42
Area (A) 31,080 mm²
Perimeter (P) 716 mm
Diagonal (d) 256.91 mm


The A5 format measures 148 x 210 mm or 5.8 x 8.3 inches. An A5 paper fromat has an aspect ratio of 1:1.42. The Area of the A5 paper size is 31,080 mm² or 48.14 in² with a perimeter of 716 mm or 28.20 in. An A5 format has a diagonal length of 256.91 mm or 10.13 in. The A5 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 A5 paper is 148 x 210 mm

The size of an A5 paper in inches is 5.8 x 8.3 in

The half size of an A5 paper is 74 x 105 mm or 2.9 x 4.15 in

The aspect ratio of an A5 is 1:1.42

The area of an A5 paper is 31,080 mm or 48.14 in

The perimeter of an A5 paper is 716 mm or 28.20 in

The diagonal measurement of A5 paper is 256.91 mm or 10.13 in

Other A Paper Sizes

There are a total of 19 A Paper Sizes.