A1 Paper Size, Dimensions and Format (A series)

A1 in millimeters

594 x 841




Aspect ratio 1:1.42
Area (A) 499,554 mm²
Perimeter (P) 2,870 mm
Diagonal (d) 1,029.62 mm


The A1 format measures 594 x 841 mm or 23.4 x 33.1 inches. An A1 paper fromat has an aspect ratio of 1:1.42. The Area of the A1 paper size is 499,554 mm² or 774.54 in² with a perimeter of 2,870 mm or 113 in. An A1 format has a diagonal length of 1,029.62 mm or 40.54 in. The A1 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 A1 paper is 594 x 841 mm

The size of an A1 paper in inches is 23.4 x 33.1 in

The half size of an A1 paper is 297 x 420.5 mm or 11.7 x 16.55 in

The aspect ratio of an A1 is 1:1.42

The area of an A1 paper is 499,554 mm or 774.54 in

The perimeter of an A1 paper is 2,870 mm or 113 in

The diagonal measurement of A1 paper is 1,029.62 mm or 40.54 in

Other A Paper Sizes

There are a total of 19 A Paper Sizes.