C3 Paper Size, Dimensions and Format (C series)


324 x 458




Aspect ratio 1:1.41
Perimeter (P) 1,564 mm
Diagonal (d) 561.02 mm
Area (A) 148,392 mm²


The C3 format measures 324 x 458 mm or 12.8 x 18 inches. An C3 paper fromat has an aspect ratio of 1:1.41. The Area of the C3 paper size is 148,392 mm² or 230.40 in² with a perimeter of 1,564 mm or 61.60 in. An C3 format has a diagonal length of 561.02 mm or 22.09 in. The C3 size belongs to the C series. In the C series there are a total of 11 paper sizes.

Frequently Asked Questions

The size of an C3 paper is 324 x 458 mm

The size of an C3 paper in inches is 12.8 x 18 in

The half size of an C3 paper is 162 x 229 mm or 6.4 x 9 in

The aspect ratio of an C3 is 1:1.41

The area of an C3 paper is 148,392 mm or 230.40 in

The perimeter of an C3 paper is 1,564 mm or 61.60 in

The diagonal measurement of C3 paper is 561.02 mm or 22.09 in

Other C Paper Sizes →

There are a total of 11 C Paper Sizes.