Dimensions in cm & pixels – that’s how big notebooks are
The DIN A5 format is primarily known as note paper. Even if the DIN A4 format is used much more frequently, many have a pad, calendar or piece of paper in DIN A5 format in their hands every day. Here you can find out the DIN A5 dimensions in cm, mm and how big the little brother of writing and printer paper is in pixels.
DIN A5 dimensions – that’s how big the sheet is
The DIN A5 format is 148mm wide and 210mm high, i.e. 14.8 cm wide and 21.0 cm high. The DIN A5 format is derived from the reference format DIN A0 (841 mm × 1189 mm). If you fold a DIN A0 sheet five times in the middle, you get the height and width dimensions of DIN A5. So if you split a DIN A4 sheet in the middle of its height, you get two DIN A5 sheets.
The DIN A5 format is also called “sheet” or “eighth sheet” and is mainly used for notepads, small exercise books (vocabulary books), brochures and diaries. The after the DIN (DGerman IInstitute for NFormation) standardized A paper sizes are used in many different countries today, but there are other sizes that offer similar dimensions. In addition, company-specific formats can be found, especially with timetable systems, which are similar to the A5 format but do not have the same dimensions.
We have summarized other formats that are similar to the A5 format and their dimensions compared to A5 and A0 in the following table:
| format | size in mm | measures in cm |
| DIN A5 | 148×210 | 14.8×21.0 |
| Invoice (ANSI) | 140×216 | 14.0×21.6 |
| Invoice (CAN P5) | 140×215 | 14.0×21.5 |
| Kiku Ban (菊判) | 150×220 | 15.0×22.0 |
| Franklin-Covey (Classic) | 140×216 | 14.0×21.6 |
| DIN A0 | 841×1189 | 84.1×118.9 |
A5 size in pixels?
If you want to create a brochure, flyer or birthday card in DIN A5 format in your image editing or layout program, you can of course create the right format right away. However, without the pixel density, one cannot simply convert pixels to centimeters or millimeters because a pixel is not a fixed unit of size. So to get the right aspect ratio, you need the pixel density in PPI (pixels per inch) and the number of pixels for height and width.
The following table shows the common point densities and how many pixels you need for height and width to generate a DIN A5 image. Please note: the higher the dot density, the sharper the image will be in the end. 300 ppi but are perfectly sufficient to produce a good print result and a sharp digital image.
| format | pixel density | resolution in pixels |
| DIN A5 | 72 ppi | 420×595 |
| DIN A5 | 150 ppi | 874×1240 |
| DIN A5 | 300 ppi | 1748×2480 |
| DIN A5 | 1200 ppi | 6992×9921 |
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