A4 Paper Size, Dimensions and Format (A series)

A4 in millimetres

210 x 297 mm




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 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.

Other A Paper Sizes

There are a total of 19 A Paper Sizes.