A5 Paper Size, Dimensions and Format (A series)

A5 in millimetres

148 x 210 mm




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 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.

Other A Paper Sizes

There are a total of 19 A Paper Sizes.