A4 paper size in different values.
A4 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.
History ISO 216: ISO 216 the international standard.
The ISO 216 is used worldwide, except in North America and parts of Latin America. The standard includes the “A”, “B” and “C” series of paper sizes. The A4 size is the most widely used worldwide. The sizes A2, A3, B3, B4 and B5 were developed in France by the mathematician Lazare Carnot. These standards were published during the French Revolution in 1798.
At the beginning of the 20th century, Dr. Walter Porstmann changed Lichtenberg’s idea into a good system of different paper sizes. In 1922 Porstmann introduced his system. The DIN became the standard (DIN 476) in Germany. Porstmann’s standard replaced some other paper systems. The DIN system is used in Germany and Austria.