C1 Paper Size, Dimensions and Format (C series)


648 x 917




Aspect ratio 1:1.42
Perimeter (P) 3,130 mm
Diagonal (d) 1,122.85 mm
Area (A) 594,216 mm²


The C1 format measures 648 x 917 mm or 25.5 x 36.1 inches. An C1 paper fromat has an aspect ratio of 1:1.42. The Area of the C1 paper size is 594,216 mm² or 920.55 in² with a perimeter of 3,130 mm or 123.20 in. An C1 format has a diagonal length of 1,122.85 mm or 44.20 in. The C1 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 C1 paper is 648 x 917 mm

The size of an C1 paper in inches is 25.5 x 36.1 in

The half size of an C1 paper is 324 x 458.5 mm or 12.75 x 18.05 in

The aspect ratio of an C1 is 1:1.42

The area of an C1 paper is 594,216 mm or 920.55 in

The perimeter of an C1 paper is 3,130 mm or 123.20 in

The diagonal measurement of C1 paper is 1,122.85 mm or 44.20 in

Other C Paper Sizes →

There are a total of 11 C Paper Sizes.