JB1 Paper Size, Dimensions and Format (Japanese series)


728 x 1030




Aspect ratio 1:1.41
Perimeter (P) 3,516 mm
Diagonal (d) 1,261.30 mm
Area (A) 749,840 mm²


The JB1 format measures 728 x 1030 mm or 28.7 x 40.6 inches. An JB1 paper fromat has an aspect ratio of 1:1.41. The Area of the JB1 paper size is 749,840 mm² or 1,165.22 in² with a perimeter of 3,516 mm or 138.60 in. An JB1 format has a diagonal length of 1,261.30 mm or 49.72 in. The JB1 size belongs to the Japanese series. In the Japanese series there are a total of 18 paper sizes.

Frequently Asked Questions

The size of an JB1 paper is 728 x 1030 mm

The size of an JB1 paper in inches is 28.7 x 40.6 in

The half size of an JB1 paper is 364 x 515 mm or 14.35 x 20.3 in

The aspect ratio of an JB1 is 1:1.41

The area of an JB1 paper is 749,840 mm or 1,165.22 in

The perimeter of an JB1 paper is 3,516 mm or 138.60 in

The diagonal measurement of JB1 paper is 1,261.30 mm or 49.72 in

Other Japanese Paper Sizes →

There are a total of 18 Japanese Paper Sizes.