A4 paper size
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A_size_illustration.png
A_size_illustration.png
A comparison of different paper sizes
The aspect ratio of all international standard paper sizes is defined as the square root of two, before rounding, which ensures that if the paper is folded or cut in half, the halves maintain the aspect ratio, and are the next standard size down (A4 becomes two sheets of A5):
- <math>\frac{297}{210} \approx \sqrt{2} \approx 1.4142<math>
The area of an A4 sheet is 1/16 m2.
See also
External link
- A thorough explanation of ISO paper sizes (http://www.cl.cam.ac.uk/~mgk25/iso-paper.html)de:A4 (Papierformat)