A0 Paper Size

What is A0 Paper Size?


A0 size is within the range of A series paper sizes of ISO 216 standard, and as the original and the biggest size of the series. A0 measures 33.11 x 46.81 in inches, 841 x 1189 in mm, and 84.1 x 118.9 in cm.

A piece of A0 paper has an area of exactly 1 square meter.

Regions of Use

In case you’re new to this- there are two most common paper size standards in the world, one is ISO standard paper size and the other is American paper size standard. The former is used in most countries except some North American countries and the Philippines.

World Regional Distribution of ISO Paper Sizes and American Paper Sizes
The areas in Yellow are where A0 size applied


As it has an area of one square meter, which is too large for easy use. Thus, it is not widely used in daily work and life. But it shines in some areas for special purposes like posters and technical drawings, where weakness can become strength.


Below is the drawing of A0 paper size in inches and mm. It is 84.1 x 11.89 in cm.

A0 Paper Size
A0 Paper Size in inches and mm


A0 Size Chart

A0 Dimensions in inches, mm, cm

Size # in inches in mm in cm
A0  33.11 x 46.81 841 x 1189 84.1 x 118.9

A0 Dimensions in pixels

A0 dimensions vary in pixels, depending on the PPI/DPI applied.

Size # 72 dpi/ppi
(screen resolution)
96 dpi/ppi
(screen resolution)
300 dpi/ppi
(print resolution)
A0  2384 x 3370  3179 x 4494 9933 x 14043

* PPI (pixels per inch) = DPI (dots per inch) = Resolution

Relations of A series Size

As the largest size in the ISO standard A size series, A0 is the initial commercial size of the ISO A series, which means that all sizes in the series are developed from it.

Specifically, all paper sizes in the ISO A series are generated by their constant average division. It works like this: Start with A0 and cut the long mid-line, or fold it in half to get two pieces of the same A1 size. And then A1 can get two sheets of the same A2 size. And so on, the order from largest to smallest is A0, A1, A2, A3, A4, A5, A6, A7, A8, etc., Moreover, the length ratio is the same for each size, following the basic rule of ISO216, that is, the ratio of the long side to the short side is √2:1.

The following drawing shows the relationship between the sizes of the ISO A paper size.

A Paper Sizes Chart
ISO Standard A Series Paper Sizes Chart

Main Facts about A0 Paper Size

A0 Dimensions:
in inches: 33.11 x 46.81″
in mm: 841 x 1189 mm
in cm: 84.1 x 118.9 cm

A0 size in pixels:
in 72 ppi/dpi: 2384 x 3370 px
in 96 ppi/dpi: 3179 x 4494 px
in 300 dpi/ppi: 9933 x 14043 px

Area: One square meter.

Country of use: Most countries except North America

Other name: DIN A0 Size

Usage: Used to make posters and technical drawings

Advantages: The area is larger, so can be used to make complex drawings, and more information can be printed.

Disadvantages: Portability is inconvenient and limited by common printing equipments.

Ratio: It follows the ratio of ISO216 size standard, length to width: 1.414:1, or √2:1.

Approximate American size: ANSI E-size, measures 864 × 1118 in mm or 34 x 44″ in inches.

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