A1 paper size in different values.

A1 size in different values. The links below give you an overview. You will find the exact numbers for Micrometres (μm), Millimetres (mm), Centimetres (cm), Metres (m), Thou (th), Inches (in), Feet (ft), Yards (yd), Pixels, Pica, Point and HPGL. Click on the link to go to the appropriate size. You can calculate your A paper size in another unit with our calculator.

A1-size in cm, pixels, mm en inches.

The A1 format is a commonly used paper format for posters and sidewalk signs. The size A1 reflects the size of a single sheet of paper.

There are different standards for the sizes of paper. A1 size is part of the A standard. The A standard is the international standard. The A standard is part of the “A”, “B” and “C” series of paper sizes of the ISO 216. The ISO 216 is the international standard for a sheet of paper. North America and parts of Central and South America use other paper sizes such as “Letter” and “Legal”.

a1 size
The ISO A1 size is used in large parts of the world (yellow color). In the blue parts the US standard “Letter” is used.

Proportions of the A1 size compared to other sizes.

An A1 has a surface area of 594 x 841 millimetres. In inches, this is 23.386 x 33.110 inches.

With the A series of paper sizes, the next size is twice as large or small. The ratio of the A-standard between the long and short side is 2:1. If you fold a sheet of paper horizontally into two equal pieces, two pieces with the same ratio are created.

ISO 216 paper sizes
Size table with the proportions of the ISO A series.

A sizes in mm and inches.

Size Millimeter Inches
4A0 1682 x 2378 66.220 x 93.622
2A0 1189 x 1682 46.811 x 66.220
A0 841 x 1189 33.110 x 46.811
A1 594 x 841 23.386 x 33.110
A2 420 x 594 16.535 x 23.386
A3 297 x 420 11.693 x 16.535
A4 210 x 297 8.268 x 11.693
A5 148 x 210 5.827 x 8.268
A6 105 x 148 4.134 x 5.827
A7 74 x 105 2.913 x 4.134
A8 52 x 74 2.047 x 2.913
A9 37 x 52 1.457 x 2.047
A10 26 x 37 1.024 x 1.457

ISO standard A, B and C series.

Finally, in addition to the A sizes, the ISO 216 standard includes B and C paper sizes. The B-series paper sizes and the C-series paper sizes are made to cover paper sizes that do not fall under the A-series.

a1-sie.com loves paper.

Do you also want to have fun with A1 paper? Then fold an airplane and see how far it flies!

folt an airplane